Post-processing apparatus

A post-processing apparatus that performs post-processing on a medium recorded by a recording section, the post-processing apparatus comprising:

• a stacking section that stacks the medium to be subjected to the post-processing;
• a first transport section that is brought into contact with the medium and applies transport force to the medium so as to transport the medium in a transport direction;
• a tip end alignment section that aligns a tip end of the medium in a downstream of the transport direction, the medium being stacked on the stacking section;
• a side edge alignment section that is configured to move in a width direction orthogonal to the transport direction of the medium and that aligns the medium by abutting on side edges of the medium from opposite sides in the width direction;
• and
• a controller that controls a position of the side edge alignment section, wherein
• the side edge alignment section is configured to move to a first position where the side edge alignment section abuts on the side edges from the opposite sides in the width direction, a second position, that is farther from the side edges in the width direction than the first position, where the medium is stacked on the stacking section, and a third position, that is between the first position and the second position in the width direction, where the side edge alignment section is in contact with the medium when the first transport section transports the medium in a skewed manner,
• the controller is configured to execute an adjustment operation of moving the side edge alignment section from the second position to the third position and an alignment operation of aligning the medium by causing the side edge alignment section to abut on the medium in the first position, and
• the adjustment operation is executed while the first transport section transports the medium and the alignment operation is executed after the adjustment operation is performed and after the medium reaches the tip end alignment section.