To stop the self-travel by a motor truck and to efficiently move the motor truck by connecting or releasing the motor truck via the action of the lift device of a cargo handling vehicle provided with the lift device capable of lifting the turning wheel side of the motor truck.

The self-travel of a motor truck 2 having large noises is stopped when it passes through a residential district at night, a cargo handling vehicle 3 having small noises is arranged on the front side of the motor truck 2, the tip of the lift body 21 of a lift device 10 is located below the front side of the motor truck 2, and a recessed coupler 23 is located below the protruded coupler 22 of a connecting device 4. The lift body 21 and the protruded coupler 22 are lifted by the lift body 10 capable of lifting the turning wheel side of the motor truck 2 to be connected to the recessed coupler 23. The motor truck 2 is towed and carried into a factory through the residential district. The connecting device 4 is provided between the motor truck 2 and the cargo handling vehicle 3 and is connected or released via the action of the lift device 10. The self-travel of the motor truck 2 is stopped, and it can be efficiently moved.