A pet waste collector is disclosed. The collector has a base collector, a wall collector, and a hinge. The base collector has a first frame and a first pet waste collecting surface. The first pet waste collecting surface is connected to the first frame. The wall collector has a second frame and a second pet waste collecting surface. The second pet waste collecting surface is connected to the second frame. The hinge pivotally connects the wall collector to the base collector. The wall collector is pivotal relative to the base collector about the hinge between a closed position and a raised position.