To provide a repolishing device for a cutting tool for extremely reducing running cost of a cutting work device, by easily and accurately repolishing by measuring an external shape regardless of a size of the cutting tool being a measuring object, and reusing even an abraded small cutting tool conventionally obliged to be disposed of.

This repolishing device for the cutting tool has a fixing part 2 for fixing the cutting tool 1, a measuring part 3 for measuring a fixing position and the fixing direction of the cutting tool 1, by measuring the external shape of the cutting tool 1 fixed to this fixing part 2, and a polishing part numerically controlled by using fixing state information and external shape information on the cutting tool 1 provided from this fixing position and the fixing direction, and repolishing this cutting tool 1. This device measures the fixing position of this cutting tool 1, by measuring installation projection quantity to the fixing part 2 of the cutting tool 1; and measures the fixing direction to the fixing part 2 of the cutting tool 1, by measuring a position of a cutting edge 1a to the fixing part 2 of the cutting tool 1, by a noncontact measuring apparatus, by arranging the noncontact measuring apparatus in the measuring part 3, for measuring the external shape of the cutting tool 1 in a noncontact state.