Patent ID: 7762541

Claim:
A sheet processing apparatus, comprising: a post-processing unit provided inside a housing and configured to perform post-processing on sheets discharged from an image forming apparatus; a sheet discharge unit configured to guide sheets having undergone post-processing in the post-processing apparatus to a discharge port formed in the housing; a paper discharge tray configured to accommodate sheets discharged from the discharge port and allowed to ascend and descend within a specific height range lower than the discharge port; and a plurality of sheet members disposed directly below the discharge port and aligned side by side in an ascending and descending direction of the paper discharge tray, and configured to move along a wall surface of the housing in association with ascending and descending of the paper discharge tray, the plurality of sheet members receive rear ends of the sheets accommodated in the paper discharge tray, a width of a receiving portion of the sheet members in a height direction varying with a quantity of the sheets accommodated in the paper discharge tray.