To provide a press-type weld straightening apparatus capable of suppressing generation of noise and dust, and easily straightening the weld distortion (deformation).

The weld straightening apparatus comprises a truck having a flat loading unit (a rectangular plate) 11, a loading means mounted on the loading unit, and a pressing unit 20 which penetrates the loading part and is vertically movable. The pressing unit has a pair of casters 70 consisting of wheels on a lower end. The distortion of a welded object is straightened by moving the pair of casters in the direction of the weld line while a weld part is held and pressed against the object.