When a bit reception plate is moved to an upper-end bit tip portion of a hole punch bit, a paper-stacking base supported by parallel link mechanisms by using a pressure force of the bit reception plate descends while maintaining a horizontal and parallel state. While paper (not shown) placed on the paper-stacking base is being intensively held by the bit reception plate and the paper-stacking base, the paper is abutted in a straight state with respect to an upper-end bit tip portion of the hole punch bit, whereby a desired number of holes can be punched into the paper. Excellent punch function, and smooth and stable discharge function of punched paper scraps with simple and inexpensive structure are secured.