To extremely reduce a space for storing a container when the container is emptied.

In a portable washing apparatus 100 equipped with a liquid- storing part for storing wash water 10, the liquid-storing part has a container 8 that is formed of a filmlike member and becomes approximately a shape of trigonal pyramid when filled with the wash water 10, a reinforcement plate 88 provided at least at one side of the container 8 for stabilizing the shape of the container 8, and a handle 89 attached to the reinforcement plate 88, and the container 8, when being emptied, can be folded up into a size approximately the same as the reinforcement plate 88.