A post-processing apparatus according to one aspect of the present disclosure includes a punching apparatus that has: a punching blade; an orthogonal direction movement portion that moves the punching blade in an orthogonal direction; a converting mechanism that converts rotational movement of a rotation member in a first rotation direction to reciprocating movement; a rotation driving portion that drives rotation of the rotation member; a rotation driving control portion; and an orthogonal direction movement control portion. The rotation driving control portion controls the rotation driving portion so as to move the punching blade toward a punching reference position when a reference position detection portion determines that the punching blade has moved beyond the punching reference position toward a through hole punching position, in a case where the punching blade is controlled so as to stop at the punching reference position.