PURPOSE: To cut freely effectively by causing no hindrance of the arcuate main body, without trouble of turning the direction of a saw blade by hands by employing bearings for the saw blade attachments of a conventional fret saw, and securing a saw blade on each side of the bearings.

CONSTITUTION: Bearings 2 are mounted on the saw blade attachments of a conventional fret saw, and on each side of the bearings 2, a saw blade 3 is secured so as to have a turning saw blade. When used in this structure, the main body is moved up and down in a manner that the turning fret saw is held by one hand for pressing the saw blade 3 against an object to be cut. Also, when an angle is required to be turned in the cutting direction, the main body is vertically operated pushing the saw blade 3 in the desired direction. As the saw blade 3 is placed in a position outward of the center of the bearings 2, the saw blade 3 is free to sway by the bearings 2, and thus the direction of the saw blade 3 is changed in the force-exerted direction.