Abstract: A body frame corrector (1) capable of efficiently correcting a complicatedly deformed frame or the like and providing an excellent workability, comprising a frame-shaped body (2) for installing a deformed body frame (40) therein, a plurality of ceiling cylinders (7), floor cylinders (10), and side cylinders (9) disposed on the ceiling surface, floor surface, inner side surfaces of the frame shaped body (2) and movable to directions along each of the respective surfaces, and tilting mechanisms for changing the pressing directions of the side surface cylinders (9).