Abstract: An apparatus for cleaning faced metal moulds of used facing comprises a frame mounting a barrel rotatable about the horizontal axis thereof. The barrel is formed with openings through which extend bars carrying on their opposite ends traverses with tiltable plates fitted with working tools for chipping off the facing and with nozzles connected to a system for supplying a working agent intended for the removal of used facing. The system for supplying the working agent comprises a fixed valve connected to a working agent source and periodically cooperating, as the traverses carrying the tiltable plates are advanced, with a corresponding receiving branch pipe arranged on the corresponding traverse formed with an interior duct in communication with said branch pipe, directing the working agent toward a header for distributing said working agent among the nozzles.