Abstract: A cat toilet assembly is disclosed. The assembly includes a box-like hollow enclosure having upstanding interconnected sides, one of which has a discharge passageway therethrough. The top of the enclosure is open and is normally closed by a selectively operable hinged trap door arranged below the top edge of the enclosure. Cat litter is received on the trap door which may be opened when it is desired to separate excrement from the cat litter. A screen member is disposed at a downwardly directed angle beneath the trap door. The lower edge of the screen communicates with the discharge passageway through the one side of the enclosure. A tray or the like is arranged below the screen to catch cleaned litter passing therethrough. A container or bag is arranged outside the passageway to receive excrement which will move along the screen and out of the enclosure because of the screen's incline.