Abstract: The invention relates to a car body rectifying device (10) having a frame (11), and a rectifying table (12) disposed to be movable in vertical direction relative thereto with attachments (13) on the rectifying table (12) to which the vehicle can be secured. To the rectifying table (12) of the rectifying device or to a frame portion connected therewith and moving along therewith or to a frame portion (b 11) which is fixed with reference to the rectifying table a rectifying unit (40) has in the horizontal plane slidably been connected. The rectifying unit(40) has a frame (41) in turn having a first frame portion (42) and a second frame portion (70) slidably disposed with reference to the first frame portion. The rectifying unit (40) also has components (47,60) for performing rectifying work both on the frame beams of the car and on the body structures themselves, the rectifying forces being directable on the object to be rectified in horizontal as well as vertical direction.