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                                                                      EXHIBIT 23






                       CONSENT OF INDEPENDENT ACCOUNTANTS


We hereby consent to the incorporation by reference in the Prospectus
constituting part of the Registration Statement on Form S-3 (No. 33-43721) and
the Registration Statement on Form S-8 (No. 333-43737 and No. 333-50793) of
Ameren Corporation of our report dated February 2, 2000, which appears on Page
14 of Ameren Corporation's 1999 Annual Report to Shareholders, which is
incorporated by reference in this Annual Report on Form 10-K. We also consent to
the incorporation by reference of our report on the Financial Statements
Schedule, which appears on Page 14 of this Form 10-K.


/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP
St. Louis, Missouri
March 30, 2000