EXHIBIT 23.1

            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors
Omnicom Group Inc.:

      We consent to the incorporation by reference in the registration
statements (Registration Statement Nos. 333-84498, 333-33972, 333-37634,
333-41717, 333-70091, 333-74591, 333-74727, 333-74879, 333-84349, 333-90931,
333-108063, 333-115892) on Form S-8, (Registration Statement No. 333-47426) on
Form S-4 and (Registration Statement Nos. 333-22589, 333-35670, 333-43883,
333-44481, 333-44483, 333-47047, 333-47342, 333-52828, 333-104391, 333-108611,
333-112840, 333-112841) on Form S-3 of Omnicom Group Inc. and subsidiaries of
our reports dated February 24, 2006, with respect to the consolidated balance
sheets of Omnicom Group Inc. and subsidiaries as of December 31, 2005 and 2004,
and the related consolidated statements of income, shareholders' equity, and
cash flows for each of the years in the three-year period ended December 31,
2005, and all related financial statement schedules, management's assessment of
the effectiveness of internal control over financial reporting as of December
31, 2005 and the effectiveness of internal control over financial reporting as
of December 31, 2005, which reports appear in the December 31, 2005 annual
report on Form 10-K of Omnicom Group Inc. and subsidiaries.

      As discussed in Note 13 to the consolidated financial statements, Omnicom
Group Inc. adopted SFAS No. 123, "Accounting for Stock-Based Compensation," as
amended by SFAS No. 148, "Accounting for Stock-Based Compensation -- Transition
and Disclosure," an amendment of SFAS No. 123 in 2004.

                                                                    /s/ KPMG LLP

New York, New York
February 24, 2006