Method and device for cleaning a tank attached to a transport vehicle

The device is provided with a storage tank (14) arranged for cleaning water on the transport vehicle (10). A cleaning water distributing device (16) is arranged at the inner wall of the tank (12) in the upper region (12a) of the tank in the cleaning position. The cleaning water-storage tank and distributing device are connected with each other through a line (18). A conveyor (20) is operative between the cleaning water-storage tank and the distributing device. An independent claim is also included for a method for cleaning tank attached to a transport vehicle.