In a body 1 for a rail truck, with a floor 2 for loading on loads, a seat plate 9 for forming a seat is mounted in a movable fashion so as to connect this seat plate 9 to a frame 6 which is provided pointing upwards at one end of the body 1 of the rail truck. At the other end of the seat plate 9, a leg support 10 for bearing the other end of the seat plate 9 is movably attached. On the floor 2 of the body 1 for the rail truck there is a plurality of attachment devices 3 for fixing a shoulder 11 which is formed at the tip of the leg support 10. The attachment device 3 permits free adjustment of the seat plate 9 which is held by the leg support 10. <IMAGE>
