DETROIT, May 17 /PRNewswire-FirstCall/ -- The Board of Directors of
Comerica Incorporated today declared a quarterly cash dividend of fifty-five
cents ($0.55) per common share. The dividend is payable July 1, 2005, to
shareholders of record June 15, 2005.

Comerica Incorporated (NYSE: CMA) is a financial services company
headquartered in Detroit, strategically aligned into the Business Bank, Small
Business & Personal Financial Services, and Wealth & Institutional Management.
Comerica focuses on relationships, and helping businesses and people be
successful. Comerica reported total assets of $53.5 billion at March 31,
2005. To receive e-mail alerts of breaking Comerica news, go to
http://www.comerica.com/newsalerts .

CONTACT: Media Contacts: Sharon R. McMurray, +1-313-222-4881, Wayne J.
Mielke, 1-313-222-4732, Investor Contacts: Helen L. Arsenault,
1-313-222-2840, Paul Jaremski, 1-313-222-6317, all of Comerica Incorporated