A cartridge is provided that reliably feeds staples even when the sheet of staples is completely unraveled. A shaft is established in the housing unit for the cartridge as a mechanism for forming a space. The shaft is not centered inside the round housing unit but is instead off-center. In other words, the shaft is located beneath the center line of the housing unit. Also, the shaft is located completely inside the hollow cavity formed by the rolled sheet of staples. As a result, the sheet of staples does not come into contact with the interior walls of the housing unit even when the rolled sheet of staples is unraveled.
A staple storage unit includes return prevention members that prevent a staple positioned for driving from moving back toward the staple storage portion of the staple storage unit. A plurality of staple abutting portions 105a and 105b are spaced along the draw out direction of the staple band 101 at distances where they do not all abut the staple linking portion 105d, thereby increasing the likelihood that at least one of the staple abutting portions will engage the staple linking portion to prevent significant withdrawal of the staple sheet back toward the staple storage portion.
