PURPOSE: To provide a short shaft associated trailer vehicle wherein a wheel in a trailer part can be swiveled or steered to the right/left associated with operating a tractor part, while arranging the trailer part just in the vicinity of a rear part of the tractor part, in order to increase a loading capacity without changing body size of an ordinary motor truck.

CONSTITUTION: A body rear part of an ordinary or large sized motor truck 1 is cut to be removed by a prescribed length, to form a tractor part 3, with a main unit constituted by setting up a connecting part in the vicinity of a rear shaft of the tractor part 3 to connect a trailer part 2, received in the original size of the motor truck 1, through a pole 22 to a body rear part of the tractor part, and the trailer part 2 using a shock absorber, connecting structure and a wheel of the trailer part 2 can be steered to be associated with right/left swiveling the pole 22.