FORM 11-K
 
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549
                                   (Mark One)
               [X] ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934
                  For the fiscal year ended: December 31, 2004

                                       OR

             [ ] TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934
                 For the transition period from:___________ to ____________
                         Commission file number: 1-13754

                             THE ALLMERICA FINANCIAL
                             AGENTS' RETIREMENT PLAN
                             -----------------------
                            (Full title of the plan)

                         ALLMERICA FINANCIAL CORPORATION
                         -------------------------------
             (Exact name of registrant as specified in its charter)

          Delaware                                            04-3263626
          --------                                            ----------
(State or other jurisdiction of                            (I.R.S. Employer
 incorporation or organization)                         Identification Number)

               440 Lincoln Street, Worcester, Massachusetts 01653
               --------------------------------------------------
                    (Address of principal executive offices)
                                   (Zip Code)

                                 (508) 855-1000
                                 --------------
              (Registrant's telephone number, including area code)

         ______________________________________________________________
        (Former name, former address and former fiscal year, if changed
         since last report)


The Allmerica Financial
Agents' Retirement Plan
Financial Statements
and Additional Information
December 31, 2004 and 2003



The Allmerica Financial Agents' Retirement Plan
December 31, 2004 and 2003
--------------------------------------------------------------------------------


TABLE OF CONTENTS




Report of Independent Registered Public Accounting Firm................... 1
Statements of Net Assets Available for Benefits........................... 2
Statements of Changes in Net Assets Available for Benefits................ 3
Notes to Financial Statements............................................. 4-9

Additional Information*

Schedule H, line 4i - Schedule of Assets (Held at End of Year)............ 10-11

















*  Other schedules required by the Department of Labor Rules and Regulations on
   reporting and disclosure under the Employee Retirement Income Security Act of
   1974, as amended, have been omitted because they are not applicable.




             Report of Independent Registered Public Accounting Firm


To the Participants and Administrator of
  The Allmerica Financial Agents' Retirement Plan:

In our opinion, the accompanying statements of net assets available for benefits
and the  related  statements  of changes in net assets  available  for  benefits
present fairly, in all material respects,  the net assets available for benefits
of The Allmerica  Financial Agents' Retirement Plan (the "Plan") at December 31,
2004 and 2003,  and the changes in net assets  available  for  benefits  for the
years then ended in conformity with accounting  principles generally accepted in
the United States of America.  These financial statements are the responsibility
of the Plan's  management.  Our responsibility is to express an opinion on these
financial  statements  based on our  audits.  We  conducted  our audits of these
statements in accordance  with the  standards of the Public  Company  Accounting
Oversight  Board  (United  States).  Those  standards  require  that we plan and
perform the audit to obtain  reasonable  assurance  about  whether the financial
statements are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements,  assessing the accounting  principles used and significant estimates
made by management, and evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

Our audits  were  conducted  for the  purpose of forming an opinion on the basic
financial statements taken as a whole. The Supplemental Schedule of Assets (Held
at End of  Year)  as of  December  31,  2004 is  presented  for the  purpose  of
additional analysis and is not a required part of the basic financial statements
but is supplementary information required by the Department of Labor's Rules and
Regulations for Reporting and Disclosure  under the Employee  Retirement  Income
Security Act of 1974. The  supplemental  schedule is the  responsibility  of the
Plan's management.  The supplemental schedule has been subjected to the auditing
procedures  applied in the audits of the basic financial  statements and, in our
opinion,  is fairly  stated in all  material  respects  in relation to the basic
financial statements taken as a whole.




Boston, Massachusetts
June 22, 2005



The Allmerica Financial Agents' Retirement Plan
Statements of Net Assets Available for Benefits
At December 31,
--------------------------------------------------------------------------------


                                                                             2004                    2003
                                                                       ------------------     -----------------       
                                                                                          
Assets
Investments, at fair value:
      Non-affiliated mutual funds:
            Fidelity Equity - Income Fund                              $   4,215,339*         $      -
            Spartan U.S. Equity Index Fund                                 2,032,724*                -
            PIMCO Total Return Fund - Administrative Class                 1,270,302*                -
            Fidelity Retirement Money Market Portfolio                     1,148,764*                -
            Artisan Mid Cap Fund                                           1,148,745*                -
            American Funds Growth Fund of America - Class R4               1,018,404*                -
            Fidelity Low - Priced Stock Fund                                 904,532*                -
            Fidelity Diversified International Fund                          516,923                 -
            Fidelity Small Cap Stock Fund                                    500,123                 -
            Fidelity Freedom 2000 Fund                                        16,460                 -
            Fidelity Freedom Income Fund                                       6,185                 -
            Fidelity Freedom 2010 Fund                                         1,585                 -
            Fidelity Freedom 2040 Fund                                           989                 -
            Fidelity Advisor Equity Income Fund                                -                   7,490,730
            Dreyfus Cash Management Plus Fund                                  -                   5,905,727
            SSgA S&P 500 Index Fund                                            -                   4,311,296
            Putnam Vista Fund                                                  -                   2,124,769
            Dreyfus Premier Core Bond Fund                                     -                   2,101,767
            CRM Small Cap Value Fund                                           -                   1,775,030
            Alliance Bernstein Premier Growth Institutional Fund               -                   1,770,177
            TCW Galileo Small Cap Growth Fund                                  -                     765,737
            MFS High-Income Fund                                               -                     261,488
                                                                       -----------------      -----------------
                                                                          12,781,075              26,506,721
      Commingled Pools:
            Fidelity Managed Income Portfolio II - Class 2                 2,703,276*                -

      Allmerica Financial Corporation Stock Fund:                                        
         Allmerica Financial Corporation Stock                               751,241               1,857,274
         Cash and equivalents                                                 24,261                  82,439
                                                                       -----------------      -----------------
                                                                             775,502               1,939,713

Investment with First Allmerica Financial Life
    Insurance Company, at contract value:
      Fixed Fund                                                               -                   3,607,260

Participant loans                                                             36,136                 182,815
                                                                       -----------------      -----------------
                                                                          16,295,989              32,236,509
                                                                       -----------------      -----------------
Other receivables                                                              -                     127,996
                                                                       -----------------      -----------------
Net assets available for benefits                                      $  16,295,989          $   32,364,505
                                                                       =================      =================

* Amount represents 5% or more of net assets available for benefits at
  December 31, 2004.



   The accompanying notes are an integral part of these financial statements.


                                       2


The Allmerica Financial Agents' Retirement Plan
Statements of Changes in Net Assets Available for Benefits
For the Years Ended December 31,
--------------------------------------------------------------------------------



                                                                        2004                   2003
                                                                ------------------     -----------------
                                                                                        
Net investment gains:
  Net appreciation of:
      Non-affiliated mutual funds                                   $ 1,057,741           $ 5,135,030
      Allmerica Financial Corporation Stock Fund                        116,635             3,106,412
  Interest and dividend income                                          669,875               471,004
  Other gains                                                                -                148,771 
                                                                ------------------     -----------------
        Total net investment gains                                    1,844,251             8,861,217
                                                                ------------------     -----------------

Benefit payments                                                    (17,912,767)          (48,615,449)                              
                                                                ------------------     -----------------
      Net decrease during year                                      (16,068,516)          (39,754,232)

Net assets available for benefits, beginning of year                 32,364,505            72,118,737
                                                                ------------------     -----------------

Net assets available for benefits, end of year                      $ 16,295,989          $ 32,364,505                          
                                                                ==================     =================









   The accompanying notes are an integral part of these financial statements.


                                       3



The Allmerica Financial Agents' Retirement Plan
Notes to Financial Statements
--------------------------------------------------------------------------------

NOTE 1 - Description of plan

     The following  description of The Allmerica  Financial  Agents'  Retirement
     Plan (the "Plan") is provided for general informational purposes only. More
     complete information is provided in the Summary Plan Description,  which is
     available from the Plan Administrator.

     General

     The Plan is a defined  contribution plan for certain  common-law  employees
     and insurance agents previously  employed by First Allmerica Financial Life
     Insurance Company ("FAFLIC",  "the Sponsor" or "the Company") and Allmerica
     Financial Life Insurance and Annuity Company ("AFLIAC").  FAFLIC and AFLIAC
     are wholly-owned subsidiaries of Allmerica Financial Corporation ("AFC").

     During 2002, the Sponsor adopted a  restructuring  plan related to its life
     insurance and annuity business.  As a result of this initiative,  all agent
     contracts  were  terminated  as of December 31, 2002,  which  resulted in a
     partial termination of the Plan (see Note 4 - Plan partial termination).

     The Plan is administered by the Sponsor ("the Plan  Administrator")  and is
     subject  to  the   provisions  of  the  Department  of  Labor's  Rules  and
     Regulations  for Reporting  and  Disclosure  under the Employee  Retirement
     Income Security Act of 1974, as amended ("ERISA").

     On October 13, 2003,  the Board of Directors of First  Allmerica  Financial
     Life  Insurance  Company  voted to  change  its  recordkeeper  from  Hewitt
     Associates LLC to Fidelity  Management Trust Company,  effective January 1,
     2004.  Additionally,  the  Board of  Directors  voted to  appoint  Fidelity
     Management  Trust  Company as  Trustee of the Plan and the AFC Stock  Fund,
     effective  January  1,  2004.  The Fixed  Fund,  which had been held by the
     Sponsor,  was liquidated at fair value  effective  January 1, 2004 upon the
     appointment of Fidelity  Management  Trust Company as the  recordkeeper and
     Trustee.  These funds were reinvested in other investment  vehicles offered
     by the Plan.  Prior to January 1, 2004, the Plan's  recordkeeper was Hewitt
     Associates,  LLC and the  Trustee  of the Plan and the AFC  Stock  Fund was
     State Street Bank and Trust Company.

     Eligibility

     The Company no longer employs any eligible  insurance  agents (see Note 4 -
     Plan partial termination).

     Employer contributions

     No contributions  were made for the 2004 or 2003 Plan years pursuant to the
     aforementioned  provisions of the Plan's partial  termination (see Note 4 -
     Plan partial termination).

                                       4


NOTE 1 - Description of plan (continued)

     Reallocated forfeitures

     Forfeitures of employer contributions related to nonvested participants who
     terminated prior to 2002 were transferred to the Fidelity  Retirement Money
     Market Fund on January 1, 2004.  Prior to that,  the balances were invested
     in the Dreyfus Cash  Management  Plus Fund.  In  accordance  with rules and
     procedures  that were  approved by the Internal  Revenue  Service  ("IRS"),
     these balances,  which were forfeited  prior to 2002,  were  reallocated in
     2004.  Forfeitures  in the amount of  $1,333,435  were  reallocated  to the
     Plan's  investment  vehicles  based upon the  investment  elections of each
     eligible participant.

     Participant accounts

     Due to the  partial  termination  of the Plan  (see  Note 4 - Plan  partial
     termination),  participants  in the Plan were not  eligible  to make 401(k)
     contributions during 2004 and 2003.

     For existing  accounts that remain in the Plan,  each  participant  has the
     ability to continue to monitor and re-direct their funds in accordance with
     the provisions of the Plan. All investment income is reinvested in the same
     investment vehicle and is credited to the respective  participant  account.
     Upon termination of the Plan,  account balances will be distributed to each
     participant  in  accordance  with  IRS  regulations  (see  Note  5 -  Other
     matters).

     Participant loans

     Effective January 1, 2003, no new loans could be initiated by participants.
     Participants   with   outstanding  loan  balances  were  allowed  to  repay
     outstanding  balances  through  December 31,  2004.  The  outstanding  loan
     balance  at  December  31,  2004  was  $36,136.   In  accordance  with  IRS
     regulations,   such  delinquent   loans  will  be  considered   participant
     distributions in 2005. Loans made to participants prior to January 1, 2003,
     were secured by the vested portion of the  participant's  account up to the
     limit as defined in the Plan document. Loans varied in duration,  depending
     upon  purpose,  and  were  at an  interest  rate  determined  by  the  Plan
     Administrator.  A  participant  was  limited  to a  maximum  of  two  loans
     outstanding  at any one time from all plans of the Company  combined.  Loan
     fees were not charged to participants. Interest income on participant loans
     totaled $2,101 and $50,141 in 2004 and 2003, respectively.

     Distributions and vesting provisions

     At December 31, 2002, all employer  contributions  for participants  became
     100% vested,  pursuant to the Plan's partial termination (see Note 4 - Plan
     partial  termination).  Prior to the  Plan's  partial  termination,  vested
     account  balances  were  payable  in the  event of  retirement,  death,  or
     separation  from  service  (including  disability)  as  defined in the Plan
     document. After the Plan's partial termination,


                                       5


NOTE 1 - Description of plan (continued)

     account   balances   are  payable  at  the  request  of  the   participant.
     Distributions to participants are payable either through a lump sum payment
     or through periodic  payments.  If a lump sum distribution is elected,  the
     participant  has the option of taking  their  balance in the AFC Stock Fund
     in-kind.

     All account balances were fully vested at December 31, 2004 and 2003.

     Payments  from  the  fund  are  subject  to  limitations  and  requirements
     specified in the Plan document.

NOTE 2 - Significant accounting policies

     Significant  accounting  and  reporting  policies  followed by the Plan are
     summarized as follows:

     Basis of presentation

     The   accompanying   financial   statements  have  been  presented  on  the
     liquidation  basis of accounting,  in accordance  with  generally  accepted
     accounting  principles.  There  currently  is  no  difference  between  the
     liquidation and accrual bases of accounting for this Plan.

     Use of estimates

     The  preparation  of financial  statements  in  conformity  with  generally
     accepted  accounting  principles  requires management to make estimates and
     assumptions  that affect the reported amounts of assets and liabilities and
     disclosure  of  contingent  assets  and  liabilities  at  the  date  of the
     financial  statements  and the  reported  amounts of revenues  and expenses
     during  the  reporting  period.  Actual  results  could  differ  from those
     estimates.

     Valuation of investments

     The Fixed Fund, which was liquidated effective January 1, 2004, was held in
     the  Sponsor's  general  account  and  provided  for  guaranteed  rates  of
     interest,  reset annually.  The credited interest rate was 1.85% for monies
     invested during 2003. The average rate of return for the Fixed Fund for the
     year ended December 31, 2003 was 4.22%.

     The  insurance  contracts  that were  underlying  the Fixed Fund were fully
     benefit-responsive and were therefore exempt from fair value accounting for
     certain  contracts  under the  provisions  of Statement  of Position  94-4,
     "Reporting  Investment  Contracts Held by Health and Welfare  Benefit Plans
     and Defined  Contribution  Plans". As such, these investments were recorded
     at contract value, which approximated fair value at December 31, 2003.
 


                                       6


NOTE 2 - Significant accounting policies (continued)

     Investments in non-affiliated  mutual funds are priced using the end of day
     fair  market  value  of  the  underlying  funds  as  recorded  by  Fidelity
     Management  Trust  Company in 2004 and as recorded by State Street Bank and
     Trust Company in 2003, which are based on the published net asset values of
     the funds.

     Investments in Fidelity Managed Income Portfolio II - Class 2, a commingled
     pool of the Fidelity  Group Trust for Employee  Benefit  Plans,  are priced
     daily. This pool primarily  invests in short or long-term  contracts issued
     by insurance companies ("GICs"),  investment contracts issued by commercial
     banks ("BICs"),  synthetic investment  contracts,  fixed income securities,
     and money market mutual funds.  The portfolio seeks to maintain a stable $1
     unit price.  Investments in GICs, BICs and synthetic  investment  contracts
     are carried at contract value as they provide for fully  benefit-responsive
     withdrawals.  Fixed  income  securities  for which  quotations  are readily
     available are valued at their most recent bid price.  For those  securities
     for which  quotations  are not readily  available,  the  security is valued
     based  upon a  method  that  the  Trustee  of  the  portfolio  deems  to be
     reflective of fair value.  Investments  in money market funds are valued at
     the net asset value each day.

     The AFC Stock Fund is stated at fair value as  determined  by quoted market
     prices of both AFC common stock and cash  equivalents held in the Fund. The
     average  investment  return  for  2004  and 2003  was  6.42%  and  190.75%,
     respectively.

     Participant loans are valued at their outstanding values, which approximate
     fair value.

     Purchases and sales of  securities  are accounted for as of the trade date.
     Dividends  are  recorded on the  ex-dividend  date and  interest  income is
     recorded on an accrual basis.
 
     Net appreciation  (depreciation)  on the fair value of investments  include
     realized gains and (losses) and unrealized  appreciation  (depreciation) of
     the investments.

     Administrative expenses and other fees

     Expenses  related to the  management  of  investments  are reflected in the
     value of each  investment  vehicle in 2004. All other fees incurred in 2004
     in the administration of the Plan were paid by the Sponsor.

     During 2003,  Hewitt  Associates  LLC  maintained  agreements  with certain
     non-affiliated  mutual funds and for such agreements  received a portion of
     certain  asset-based fees (12b-1 fees) charged by the fund. These fees were
     calculated  based on the  average  daily net asset  value of Plan assets in
     each  respective  fund.  These  fees were used to reduce  charges by Hewitt
     Associates LLC to the Sponsor for certain  administrative  and professional
     services. In addition, the
 

                                       7


NOTE 2 - Significant accounting policies (continued)

     Sponsor paid all other expenses  incurred in 2003 in the  administration of
     the Plan.

     Payment of benefits

     Benefits are recorded when paid.

NOTE 3 - Federal income taxes

     The IRS has  determined and informed the Sponsor by a letter dated July 10,
     2002, that the Plan is qualified and the trust  established  under the Plan
     is tax exempt under the appropriate  sections of the Internal Revenue Code.
     The Plan Administrator  believes that the Plan continues to be designed and
     is currently being operated in compliance with the applicable provisions of
     the  Internal  Revenue  Code.  Therefore,  no  provision  for income tax is
     required.

NOTE 4 - Plan partial termination

     The Plan  provides  that in the  event  the  Plan is  wholly  or  partially
     terminated,  or upon the complete discontinuance of contributions under the
     Plan by the Sponsor,  each  affected  participant's  interest in the Plan's
     assets  as  of  the   termination   date  shall   become  100%  vested  and
     nonforfeitable.  As such, in accordance with Plan  provisions,  the Sponsor
     vested  all agents  100% as of  December  31,  2002,  including  previously
     terminated agents whose non-vested  account balances had not been forfeited
     by December 31, 2002. In addition, upon termination of the Plan, the assets
     become  either  payable  to  the  participant  or  applied  to  purchase  a
     nonforfeitable retirement annuity at the participant's option.
 
     As a result of the  termination  of all agent  contracts,  there will be no
     future agent or Sponsor  contributions to the Plan. For the agents' current
     balances,  each agent has the  option to roll over  their  funds to another
     qualified plan or individual retirement account, receive a distribution, or
     remain in the Plan until such time that the Plan is fully  terminated.  For
     those  accounts  that  remain in the Plan,  each  agent has the  ability to
     continue  to monitor  and  direct  their  funds,  in  accordance  with Plan
     provisions.

NOTE 5 - Other matters

     On June 22, 2004,  the Board of Directors of FAFLIC voted to terminate  the
     Plan as a result of the aforementioned  termination of agent contracts.  On
     July 1, 2004,  the Sponsor  filed with the IRS a request to  terminate  the
     Plan.  Pending  approval  from the IRS,  the  Sponsor  will  develop a plan
     regarding the timing and the distribution of Plan assets.

     Effective January 1, 2003,  certain agents became employees of the Company.
     The AFC Board of Directors approved eligibility for immediate participation
     in The 

                                       8


NOTE 5 - Other matters (continued) 

     Allmerica Financial Employees' 401(k) Matched Savings Plan for these former
     agents.

NOTE 6 - Subsequent events

     During the first five months of 2005, there have been participant initiated
     withdrawals of  approximately  $1.8 million,  primarily  resulting from the
     aforementioned termination of agent contracts.


                                       9



The Allmerica Financial Agents' Retirement Plan
Form 5500, Schedule H, Line 4i
Schedule of Assets (Held at End of Year)
At December 31, 2004
--------------------------------------------------------------------------------




           Identity of                         Description of                Shares or
             Issue                               Investments                   Units        Current Value
              
                                                                                                   
Investments with non-affiliated
mutual funds:

    *Fidelity Equity - Income Fund Diversified portfolio of large-cap           79,866      $ 4,215,339
                                   value companies.

    *Spartan U.S. Equity Index     Common stocks primarily those included       47,427        2,032,724
     Fund                          in the S&P Composite Stock Index.

     PIMCO Total Return Fund -     Invests primarily in debt securities,       119,054        1,270,302
     Administrative Class          such as: U.S. government securities,
                                   corporate bonds, and mortgage-related
                                   securities.

    *Fidelity Retirement Money     Invests in U.S. dollar-denominated        1,148,764        1,148,764
     Market Portfolio              money market securities of domestic
                                   and foreign issuers as well as
                                   repurchase agreements.

     Artisan Mid Cap Fund          Long-term capital growth fund of             38,861        1,148,745
                                   mid-size companies.

     American Funds Growth Fund    Large-cap growth fund invested               37,400        1,018,404
     of America - Class R4         primarily in common stocks.

    *Fidelity Low - Priced Stock   Small-cap blend fund seeking capital         22,472          904,532
     Fund                           appreciation.                                             

    *Fidelity Diversified          Large-cap growth fund invested               18,049          516,923   
     International Fund            primarily in non-U.S.                                   
                                   dollar-denominated common stocks.


    *Fidelity Small Cap Stock Fund Small-cap fund focused on long-term          27,540          500,123
                                   growth of capital by investing in both
                                   growth and value oriented
                                   securities.


    *Fidelity Freedom 2000 Fund    Conservative allocation fund invested         1,363           16,460
                                   in Fidelity equity, fixed-income, and
                                   money market funds.
                                   Target to investors already in
                                   retirement.


                                       10


The Allmerica Financial Agents' Retirement Plan
Form 5500, Schedule H, Line 4i (continued)
Schedule of Assets (Held at End of Year)
At December 31, 2004
--------------------------------------------------------------------------------



           Identity of                         Description of                Shares or
             Issue                               Investments                   Units       Current Value

                                                                                    
   *Fidelity Freedom Income Fund   Invests in a combination of Fidelity          549      $       6,185
                                   equity, fixed-income, and money market
                                   funds.  Designed for investors already
                                   in retirement.

    *Fidelity Freedom 2010 Fund    Invests in a combination of Fidelity          116              1,585
                                   equity, fixed-income, and money market
                                   funds.  Targeted to investors expected
                                   to retire around the year 2010.

    *Fidelity Freedom 2040 Fund    Large-cap blend fund that invests in a        120                989
                                   combination of Fidelity equity, fixed
                                   income, and money market funds.
                                   Targeted to investors expected to
                                   retire around the year 2040.

Commingled Pool:
   *Fidelity Managed               Stable value fund invested in           2,703,277          2,703,276
    Income Portfolio II - Class 2  investment contracts issued by
                                   insurance companies and other
                                   financial institutions, and in fixed
                                   income securities.

*Allmerica Financial
Corporation Stock Fund:
    *Allmerica Financial           Common stock traded on the New York                          751,241
     Corporation Stock             Stock Exchange.

    Cash and equivalents                                                                       24,261


*Participant loans                 Interest rates from 5.75% to 7.75%.                           36,136
                                                                                          ---------------
Total investments                                                                         $  16,295,989
                                                                                          ===============






*        Represents party-in-interest.



                                       11



                                   SIGNATURES

The Plan.  Pursuant to the requirements of the Securities  Exchange Act of 1934,
the trustees (or other persons who  administer  the employee  benefit plan) have
duly  caused this  annual  report to be signed on its behalf by the  undersigned
hereunto duly authorized.


                                THE ALLMERICA FINANCIAL
                                AGENTS' RETIREMENT PLAN
                                -----------------------
                                (Name of Plan)
 
                                 /s/ John Taylor

                                 ----------------
                                                                              
                                Plan Administrator:  First Allmerica Financial
                                Life Insurance Company by John Taylor
                                Vice President, Compensation and Benefits

                                June 24, 2005


                                       12



Exhibit Index

Exhibit 23.1      Consent of Independent Registered Public Accounting Firm


                                       13