Exhibit 23



                         CONSENT OF INDEPENDENT AUDITORS
                         -------------------------------



We  hereby  consent  to the  incorporation  by  reference  in  the  Registration
Statements on Form S-8 (Nos.  333-43743 and 333-101506) of Ameren Corporation of
our report  dated June 18, 2004  relating  to the  financial  statements  of the
Ameren Corporation Employee Long-Term Savings Plan - IUOE No. 148, which appears
in this Form 11-K.



/s/ PricewaterhouseCoopers LLP
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PricewaterhouseCoopers LLP
St. Louis, Missouri
June 28, 2004