Sheet after-treatment device and image forming apparatus equipped with the device

摘要

A sheet after-treatment device equipped with a stapler main body which staples sheets fed between upper and lower jaws in an opened state with a staple by closing the upper and lower jaws, and a holder for holding the stapler main body, in which a sheet transport guide surface of an upstream-side portion of the holder and the lower jaw of the stapler main body are arranged in the area where the sheets are transported, and the sheet transport guide surface of the upstream-side portion of the stapler main body is situated above the lower jaw.