To actualize a mechanism which easily fixes a guard, etc., at an arbitrary distance from a main body in a guard anchor which fits the guard at the arbitrary distance from the main body.

The guard anchor is equipped with a fixation part having a circular or slit opening part provided to the guard so as to fix the guard to the main body 1, an opening part which is a hole bored in the main body 1 so as to fix the fixation part of the guard and provided with plural grooves 6 halfway, and an anchor 2 which fixes the opening part through the circular or slit opening part of the fixation part and fixes its tip by expanding it at a specific position among the grooves 6 of the opening part.