An excrement includes a hollow box body having an opening for covering a cover body thereon. The box body and the cover body are connected to a hanging body. A first inner cup and a second inner cup are contained in the box body. The second inner cup is inserted and disposed into the first inner cup. Each inner cup is in a box shape, which can be flattened into a thin flat sheet. The storage space required for the inner cups is thus reduced. In addition, the accessibility and the portability of the inner cups are also enhanced. Therefore, whenever bringing a pet outdoors, one can easily clean up the excrement of the pet by employing the excrement container of the present invention.