| 摘要 |
A sheet processing apparatus includes an alignment unit configured to align sheets stacked on a stack tray. The sheet processing apparatus determines whether or not a part of sheets stacked on the stack tray has been removed from the stack tray. When it is determined that a part of sheets stacked on the stack tray has been removed from the stack tray, the sheet processing apparatus inhibits an alignment of the sheets using the alignment unit. |
