EXHIBIT 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statements No.
333-29203 and No. 333-60909 on form S-8 of our report dated March 25, 2005,
relating to the financial statements and financial statement schedules of Core
Molding Technologies, Inc. and subsidiaries appearing in this Annual Report on
Form 10-K of Core Molding Technologies, Inc. for the year ended December 31,
2004.

/s/ Deloitte & Touche LLP
- -------------------------
Columbus, Ohio
March 25, 2005

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