CARTRIDGE

A cartridge includes a staple support part provided on a front end face. The staple support part includes an inclined surface protruding obliquely from the front end face in a striking direction， and is configured to support a crown portion of the staple with the inclined surface and a pair of leg portions of the staple with side edge portions of the inclined surface. The side edge portion has: a connection portion continuing to the inclined surface and extending from the inclined surface in an opposite direction to a feeding direction of the staple， by a first length; and a leg portion contact portion extending with being folded from a tip end portion of the connection portion in the feeding direction by at least the first length， and configured to support corresponding one of the pair of leg portions from an inner side thereof.