To provide a paper sheet post-processing apparatus which when stacking on a paper discharge tray paper sheet bundles one width-direction end of each of which has been bound by a binding member, suppresses shifting of the stacked paper sheet bundles in the width direction of the paper sheet bundle along the inclination of the paper sheet bundles.
The paper sheet post-processing apparatus includes: a binding device for binding a plurality of paper sheets by means of the binding member 71 to form the paper sheet bundle P; a discharge device 22 for discharging the paper sheet bundles; and the paper discharge tray 23 on which the paper sheet bundles discharged by the discharge device are stacked. A plurality of guiding members 24a and 24b for guiding the paper sheet bundle discharged from the discharge device while projecting/retracting in the paper sheet bundle discharging direction are provided on the upper position of the paper sheet discharge tray at a predetermined interval in a direction perpendicular to the paper sheet bundle discharging direction, and the guiding members are configured to individually project/retract in the paper sheet bundle discharging direction.
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