Abstract: A cleaning device for a powder coating compartment that comprises a tube system that can be moved back and forth under motor drive through the compartment with a conveyor that passes through a longitudinal slot in the compartment roof and that is equipped with nozzles through which compressed air can be blown against the compartment walls, The tube system comprises two tube branches that are respectively arranged at the contour of the compartment roof and the compartment side walls symmetrically relative to a longitudinal center plane; and in that the compartment floor not swept by the tube system is covered by a discharge belt for eliminating excess powder. The belt is cleaned by a belt cleaning mechanism.