

                       INDEPENDENT TAX ADVISORS' CONSENT

   
     We hereby  consent to the  summarization  of our tax opinion and the use of
our name as they  appear  under  the  "U.S.  Federal  and  Canadian  Income  Tax
Consequences"  section of the  Registration  Statement of Omnicom  Group Inc. on
Form S-4 as filed with the Securities and Exchange  Commission on June 19, 1995,
as  amended.  We also  consent to the filing of our tax opinion as an exhibit to
the  Registration  Statement of Omnicom Group Inc. on Form S-4 as filed with the
Securities and Exchange Commission on June 19, 1995, as amended.
    

/s/ DELOITTE & TOUCHE LLP
DELOITTE & TOUCHE LLP
Detroit, Michigan

   
August 3, 1995
    

