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 October, 2004

                         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.   English translation of the Japanese-language Financial Digest for the
     interim fiscal period ending September 30, 2004, as filed with the Tokyo
     Stock Exchange on October 26, 2004.
2.   English translation of a press release dated October 26, 2004, announcing
     the merger of Advantest RF Technology Corporation into the Company
     through a simplified merger.
3.   English translation of a press release dated October 26, 2004, announcing
     the terms of stock acquisition rights to be issued in connection with the
     grant of stock options.









                                   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:  October 27, 2004