UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                               ------------------
                                    FORM 6-K

                        REPORT OF FOREIGN PRIVATE ISSUER
                        PURSUANT TO RULE 13a-16 OR 15d-16
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                                ------------------
                         For the month of December 2004

                        Commission File Number: 001-31368

                                 SANOFI-AVENTIS
                 (Translation of registrant's name into English)

                   174, avenue de France, 75013 Paris, FRANCE
                    (Address of principal executive offices)

         Indicate by check mark whether the registrant files or will file annual
reports under cover 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" marked, indicate below the file number assigned to the 
registrant in connection with Rule 12g3-2(b):  82-________

This Report on Form 6-K shall be deemed to be incorporated by reference into
Sanofi-Aventis' (formerly known as Sanofi-Synthelabo) Registration Statement on
Form F-4 (Registration No. 333-112314), as post-effectively amended and declared
effective on November 10, 2004 by the United States Securities Exchange
Commission, and the related prospectus, dated November 10, 2004, filed pursuant
to Rule 424(b) under the United States Securities Act of 1933, as amended, and
shall be part thereof from the date on which this Report is filed, to the extent
not superseded by documents or reports subsequently filed or furnished.





         On December 20, 2004, Sanofi-Aventis (formerly known as
Sanofi-Synthelabo) issued the press release attached hereto as Exhibit 99.1
which is incorporated herein by reference.

                                  EXHIBIT LIST

Exhibit No.                        Description 
-----------                        -----------                                  
Exhibit 99.1       Press Release, dated December 20, 2004, announcing that
                   U.S. Patent Office has issued Notice of Allowance on
                   Aventis's reissuance application for Lovenox(R) `618 patent.





                                   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.


Dated: December 20, 2004                 SANOFI-AVENTIS


                                   By:/s/ Jean-Claude Leroy                     
                                      ------------------------------------------
                                      Name:    Jean-Claude Leroy
                                      Title:   Senior Vice President &
                                               Chief Financial Officer






                                  EXHIBIT INDEX

Exhibit No.                        Description
----------                         -----------
Exhibit            99.1 Press Release, dated December 20, 2004, announcing that
                   U.S. Patent Office has issued Notice of Allowance on
                   Aventis's reissuance application for Lovenox(R) `618 patent.