Abstract: A portable harness bag for collection of waste matter comprising a resilient frame supporting a light-weight bag of thin gauge plastic. A first tie means secures the frame to the hindquarters of the animal while a second tie means encircles the tail of the animal at the base thereof releasably securing the opposite edge of the frame thereto. The bag opening and central portion of the frame are aligned at the hindquarters of the animal to receive and collect solid waste matter. The tie means may be released to remove a filled bag and replace it with a fresh bag.In an alternative embodiment, the frame is provided with hingedly connected projections serving to releasably secure the bag to the frame when in the operative position.