Patent ID: 8480069

Claim:
A sheet processing apparatus comprising: a correcting unit that corrects alignment of a sheet, wherein the correcting unit includes a base fence that stops an end of the sheet on an upstream side in a sheet conveying direction so that a trailing end of the sheet is aligned; a post-processing unit that performs post-processing on the sheet after the correcting unit corrects the alignment of the sheet, wherein the post-processing unit includes a binding unit, the binding unit including a tray on which a sheet is placed; a creasing unit that forms a crease on the sheet after the correcting unit corrects the alignment of the sheet, the creasing unit is provided in the tray; and a position setting unit that sets a position of a sheet relative to the creasing unit, wherein the creasing unit performs a creasing process after the position setting unit sets the position, wherein the position setting unit includes a moving unit that moves the creasing unit in a direction parallel to the tray and sets the creasing unit at a position where a sheet is to be creased.