This sheet punching device includes a placement table (53) on which the sheet is placed, a hollow punching member (60) that punches the sheet placed on the placement table (53), a punching moving member (66) that moves the punching member between a punching position where the sheet is punched and a retreat position retreated from the punching position, a punching drive section (70) that drives the punching moving member (66), a waste pushing member (80) that is disposed in the hollow portion of the punching member (60) and pushes punching waste remaining in the hollow portion, a pushing moving member (85) that moves the waste pushing member (80) between a pushing position protruding from the hollow portion of the punching member and a housing position in the hollow portion, and a pushing drive section (70) that drives the pushing moving member (85).