COMMERCE BANK ANNOUNCES OFFICER ELECTIONS AND PROMOTIONS

KANSAS CITY, MO - December 29, 2003 - The Board of Directors of Commerce Bank, Kansas City, announced the following officer promotions and elections.

Melinda Walker has been elected Assistant Vice President in Retail Lending and Payment Systems (RLPS), as the Research and Database Manager. She manages statistical analysis projects and provides support for credit and debit business planning. Walker earned a Bachelor of Science degree in Statistics and Psychology from the University of Missouri and a Masters degree in Statistics from Southern Illinois University.

Chris Wiedenmann has been elected Officer in the Operations Department, as Senior Project Analysis for the Deposit Operations Project Office. He is responsible for management of multiple projects within the Deposit Operations division. Wiedenmann earned a Bachelor of Science degree in Business Administration from the University of Kansas.

About Commerce Bank
Commerce Bank is the principal subsidiary of Commerce Bancshares, Inc. (NASDAQ: CBSH), a $13.6 billion regional bank holding company. For more than 135 years, Commerce has been meeting the financial services needs of individuals and businesses. Commerce provides a diversified line of financial services, including business and personal banking, wealth management and estate planning and investments through its affiliated companies. Commerce operates across three states with approximately 330 locations and also has operating subsidiaries involved in mortgage banking, credit related insurance, venture capital and real estate activities.

For more information contact:
Jill Swords
Regional Marketing Representative
816-234-2308

Website: www.commercebank.com
e-mail: mymoney@commercebank.com
SYMBOL: CBSH

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