EXHIBIT 23


            Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statements
(Form S-8 Nos. 333-84499, 33-98918, 333-26737, 333-70346, and 333-126478)
pertaining to the Acme United Corporation Amended and Restated Stock Option
Plan, the Registration Statements (Form S-8 Nos. 333-84505, 333-26739,
333-70348, and 333-126478) pertaining to the Acme United Corporation
Non-Salaried Director Stock Option Plan and the Registration Statement (Form S-8
No. 333-84509) pertaining to the Acme United Corporation Deferred Compensation
Plan for Directors and Acme United Corporation Deferred Compensation Plan for
Walter C. Johnsen of our report dated March 9, 2007, with respect to the
consolidated financial statements and schedule of Acme United Corporation and
subsidiaries included in the Annual Report (Form 10-K) for the year ended
December 31, 2006.


/s/ Ernst & Young LLP

Hartford, Connecticut
March 9, 2007