

                       INDEPENDENT TAX ADVISORS' CONSENT

     We hereby  consent to the  summarization  of our tax  opinion as it appears
under  the  "Certain  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. 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.

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

June 19, 1995

