Patent ID: 8365970

Claim:
An electric stapler comprising: a driver for driving leg portions of a bent-formed staple having a U-shaped section to penetrate the leg portions through a paper bundle; a table including a clincher for bending and forming the penetrated leg portions inwardly, the table having a surface for holding the paper bundle between the driver and the table having a surface for holding the paper bundle between the driver and the table; a motor for moving the table and the driver relative to each other; a photo sensor for detecting an existence of the paper bundle inserted into a gap between the table and the driver; and a control portion for driving the motor when the paper bundle is detected by the photo sensor, wherein the photo sensor is disposed on the table in such a manner that a detection point of the photo sensor for detecting the paper bundle exists upwardly of a disposing position of the clincher by inclining an optical axis direction of a radiation light to be emitted from the photo sensor in a direction of the clincher such that the optical axis direction of the radiation light is oblique to an axis perpendicular to the surface of the table that holds the paper bundle.