Abstract: A main body of an opening and closing member is arranged so as to cover a handling hole from one side of a wall, such as a container wall. The opening and closing member is mounted to the container by engaging an engagement portion with a flange formed at the periphery of the handling hole. When a user inserts a hand into the handling hole and pushes the main body, the main body moves away from the wall, and the handling hole is uncovered. By so doing, the user can insert his or her hand into the handling hole and carry the container or other object. Then, when the user removes his or her hand from the handling hole, the main body moves toward the wall, and an outer periphery of the main body contacts the wall at the periphery of the handling hole and returns to the original position. Thus, the handling hole is covered from one side of the wall. By so doing, dirt, water and/or the like can be suppressed from passing through the handling hole.