UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                              --------------------

                                    FORM 8-K

                                 CURRENT REPORT
                              ---------------------

                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

       Date of Report (Date of earliest event reported): February 23, 2009

                             PS BUSINESS PARKS, INC.
             (Exact Name of Registrant as Specified in its Charter)

           California                      1-10709               95-4300881
 (State or Other Jurisdiction of   (Commission File Number)  (I.R.S. Employer
         Incorporation)                                      Identification No.)

701 Western Avenue, Glendale, California                         91201-2349
(Address of Principal Executive Offices)                         (Zip Code)

                                 (818) 244-8080
              (Registrant's telephone number, including area code)

Check the  appropriate  box below if the Form 8-K is intended to  simultaneously
satisfy  the filing  obligation  of the  registrant  under any of the  following
provisions:

|_|    Written  communication  pursuant to Rule 425 under the Securities Act (17
       CFR 230.425)

|_|    Soliciting  material  pursuant to Rule 14a-12  under the Exchange Act (17
       CFR 240.14a-12)

|_|    Pre-commencement  communications  pursuant  to Rule  14d-2(b)  under  the
       Exchange Act (17 CFR 240.14d-2(b))

|_|    Pre-commencements  communications  pursuant  to Rule  13e-4(c)  under the
       Exchange Act (17 CFR 240.13e-4(c))








ITEM 5.02 DEPARTURE OF DIRECTORS OR CERTAIN OFFICERS; ELECTION OF DIRECTORS;
APPOINTMENT OF CERTAIN OFFICERS; COMPENSATORY ARRANGEMENTS OF CERTAIN OFFICERS.

       On February 23, 2009, PS Business Parks,  Inc. (the  "Company")  issued a
press release  announcing  the election by the Board of Directors of the Company
of Jennifer  Holden Dunbar as a member of the Board of Directors of the Company.
A copy of the press  release is attached as Exhibit 99.1 to this current  report
on Form 8-K.

       There is no arrangement or understanding pursuant to which Ms. Dunbar was
nominated or elected as a director, and there have been no transactions,  either
since the  beginning  of the  Company's  last fiscal year or that are  currently
proposed,  regarding  Ms.  Dunbar that are required to be disclosed  pursuant to
Item  404(a)  of SEC  Regulation  S-K.  Ms.  Dunbar  has not been  appointed  to
committees of the Board of Directors at this time.

ITEM 5.03 AMENDMENTS TO ARTICLES OF  INCORPORATION  OR BYLAWS;  CHANGE IN FISCAL
YEAR

       Effective February 23, 2009, the Company's Board of Directors amended the
second  sentence of Section 2 of Article IV of the  Company's  Bylaws to read as
follows:

          "The exact number of directors  shall be nine (9) until changed within
       the limits  specified  above,  by a bylaw  amending  this section 2, duly
       adopted by the board of directors or by the shareholders."

ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS

         (c)      EXHIBITS

Exhibit 99.1--Press release dated February 23, 2009

                                   SIGNATURES

       Pursuant to the requirements of the Securities  Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

Date:    February 25, 2009

                                                    PS BUSINESS PARKS, INC.


                                                    By: /s/ Edward A. Stokx
                                                        -----------------------
                                                        Edward A. Stokx
                                                        Chief Financial Officer





                                  Exhibit Index


The following exhibit is being furnished with this Report:

   Exhibit 99.1--Press Release dated February 23, 2009. Filed herewith.