To correct a deformed leg part such as O-shaped legs or the like by utilizing free time.

Synthetic resin or the like is molded in a recessed shape and turned to a tool main body 1 provided with a groove part 12 and the required number of clamps 2 are mounted to the tool main body 1. A guiding groove 15 is formed in the longitudinal direction on the side wall 13 of the tool main body 1 and a cushion 16 is fixed to the inner side of the other side wall 14. A nut 23 is freely slidably attached to the guiding groove 15 and a screw shaft 21 is screwed into the nut 23. A pressure plate 22 is freely swingably attached to one end of the screw shaft 21 and the pressure plate 22 is moved forwards and backwards in an axial direction through the screw shaft 21. Then, the leg part of a human body is housed in the groove part 12 of the tool main body 1, the pressure plate 22 is force-fitted to the part of the leg part by the operation of the screw shaft 21 and the deformed leg part such as the O-shaped leg or the like is corrected.