SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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                                    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): April 22, 2004

                           ART TECHNOLOGY GROUP, INC.
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               (Exact name of registrant as specified in charter)

           Delaware                     000-26679             04-3141918
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(State or other jurisdiction of        (Commission           (IRS Employer
         incorporation                File Number)        Identification No.)


  25 First Street, Cambridge, Massachusetts                   02141
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  (Address of principal executive offices)                  (Zip Code)


        Registrant's telephone number, including area code: 617-386-1000

                                 Not Applicable
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          (Former name or former address, if changed since last report)






Item 12.  Results of Operations and Financial Condition.

     On April 22,  2004,  we issued a press  release  announcing  our  financial
results for the quarter ended March 31, 2003. The full text of the press release
is attached as Exhibit 99.1 to this report.

     The  information  contained  in Item 12 of this  report  and  Exhibit  99.1
attached  hereto  shall not be deemed  "filed" for purposes of Section 18 of the
Securities  Exchange Act of 1934 or otherwise subject to the liabilities of that
section,  nor shall it be deemed  incorporated  by reference in any filing under
the  Securities Act of 1933 or the  Securities  Exchange Act of 1934,  except as
expressly set forth by specific reference in such a filing.




                                    SIGNATURE

     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:  April 22, 2004         ART TECHNOLOGY GROUP, INC.

                             By: /s/Edward Terino
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                                 Edward Terino, Senior Vice President and Chief
                                 Financial Officer


                                  EXHIBIT INDEX

Exhibit No.                 Description
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99.1                        Press release dated April 22, 2004