Abstract: A cleaning system for cleaning the outer skin of aircraft of all types is provided with a cleaning head (1). This cleaning head (1) is fastened to an arm, which is mounted on a system support, for example, on a low-bed truck. The cleaning head (1) is provided with one or more rollers (2, 7, 13), whereby openings (5, 9, 11) are provided in hollow shafts (3, 8, 12). A cleaning medium, steam and polishing agent can be introduced via said openings, and the waste water contaminated with the dirt particles that are removed from the outer skin of the aircraft can be suctioned off also via said openings.