An improved manually manipulated meat trimming knife of the type having a handpiece which terminates at one end in a concave configuration on which is mounted a ring-shaped blade holder. A locking key is slidably mounted in a keyway formed in the concave end of the handpiece and is engagable with a ring-shaped cutting blade for releasably mounting the blade on the blade holder. A spring biased pin releasably secures the key in a forward engaged position with the cutting blade. One or more tabs are formed on the blade holder and form an arcuate groove for slidably receiving and supporting the blade therein. The tabs and locking key enable the cutting blade to be removed and installed on the holder without removing or loosening any mounting or adjusting screws.
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