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Sanofi-aventis Press Release

Sanofi-aventis Board of Directors of December 16, 2009

Paris, France - Decem ber 16, 2009 - The Board of Directors of sanofi-aventis
met today and has co-opted Serge Weinberg as a Director to replace Gunter
Thielen, who has resigned for personal reasons.

This cooptation will be submitted to the ratification of the General Meeting of
Shareholders that will take place on May 17, 2010. It has been planned to
propose to the sanofi-aventis Board of Directors, which will take place
following the General Meeting, the appointment of Serge Weinberg as
non-executive Chairman of this Board to replace Jean-François Dehecq, who will
then reach the statutory age limit.

On this occasion, the Board of Directors congratulates Christopher A.
Viehbacher, Chief Executive Officer for the excellent work performed since he
took his position on December 1, 2008, and confirms the strategic orientations
implemented with success.

About Serge Weinberg
Born in 1951, Serge Weinberg holds a Bachelor's degree in Law, a Graduate Degree
of " Institut d'Études Politiques " and is a Graduate of the ENA - Ecole
Nationale d'Administration (1976). He held different positions as a "
sous-préfet " from 1976 to 1981, and became Chief of Staff of the French Budget
Minister, Laurent Fabius, in 1981. After a position as Deputy General Manager
for Finance at the French Television Channel FR3 (1982-1983), he became Chief
Executive Officer and then Chairman of the Havas Tourisme Group from 1983 to
1987. He was then appointed CEO of Pallas Finance for three years and joined the
Pinault Group in 1990 as President of CFAO. In the Pinault Group he was then
appointed Chairman and CEO of Rexel from 1991 to 1995 and chaired the Management
Board of the PPR Group for 10 years. In March 2005, he founded the investment
firm Weinberg Capital Partners, which manages funds dedicated to LBO and real
estate. He is also Vice-Chairman of the Supervisory Board of Schneider Electric.
Serge Weinberg was also nonexecutive Chairman of the Board of the Accor Group
from 2006 to 2009. He was a member of the " Growth Release Committee " (Attali
Committee, 2007-2008). He is a member of the Board of AFEP (French Association
of Private Enterprises) and is also Founding Member and Treasurer of the "Brain
and Spinal Cord Institute" - Institut du Cerveau et de la Moelle Épinière
(ICM).

About sanofi-aventis
Sanofi-aventis, a leading global pharmaceutical company, discovers, develops and
distributes therapeutic solutions to improve the lives of everyone.
Sanofi-aventis is listed in Paris (EURONEXT: SAN) and in New York (NYSE: SNY).

Sanofi-aventis: www.sanofi-aventis.com
Media Relations: Tél.: (+) 33 1 53 77 44 50 - E-mail: MR@sanofi-aventis.com
Investor Relations: Tél.: (+) 33 1 53 77 45 45 - E-mail: IR@sanofi-aventis.com

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