6K

FORM 6-K

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 of
the Securities Exchange Act of 1934

For the month of February, 2005

Commission File Number 1-15236

Advantest Corporation
(Translation of Registrant’s Name Into English)

Shin Marunouchi Center Building
1-6-2, Marunouchi
Chiyoda-ku
Tokyo 100-0005
Japan

(Address of Principal Executive Offices)

        Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. Form 20-F X Form 40-F __

        Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): __________

        Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): __________

        Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934. Yes         No X

        If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): __________


Materials Contained in this Report:

1.     Written Oath Regarding Timely Disclosure, filed by the registrant to the Tokyo Stock Exchange on February 25, 2005.


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, thereunto duly authorized.

    Advantest Corporation


By:   /s/ Hitoshi Owada                                      
Name:   Hitoshi Owada
Title:     Director and
              Managing Executive Officer


Date: February 28, 2005