Abstract: An appliance for collecting animal excrement in which a harness is fitted on the trunk of a dog for holding a collector in a position transversely across the rear of the dog below the base of the tail and the anal opening. The harness has an extension extending along the tail and terminating in a top fastener spaced outwardly from the base of the tail. The collector has a top opening with a pair of tab elements adapted to be connected together and engaged with said top fastener on the top surface of the tail. The harness has side members with side fasteners at opposite sides of the dog which are used to position the collector snugly against the rear of the dog below the anal opening. The top opening of the collector is closed when the tail is lowered and is opened when the tail is raised to a normal defecating position. The illustrated harness has loops adapted to encircle the four legs of the dog and a ring providing a site for attaching a leash to the harness.