|EXHIBIT 13.1                                                                                                                                                                                                                                                                                                                                                                                   
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|CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002                                                                                                                                                                                                                                                                         
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|In connection with the Annual Report of Havas (the Company) on
Form 20-F for the year ended December 31, 2004 as filed with the Securities and
Exchange Commission on the date hereof (the Report), I,
Richard Colker, Chief Executive Officer of the Company, certify, pursuant to 18
U.S.C. § 1350, as adopted pursuant to § 906 of the
Sarbanes-Oxley Act of 2002, that to my knowledge:
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|(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
Date: June 28, 2005                                                                                         

| | /s/ Richard Colker                    
| | --------------------------------------
| |                                       
| | Richard Colker
Chief Executive Officer

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