A staple refill including a refill body accommodating sheet-type connected staples. The refill body includes a bottom wall, a right wall provided on a right side of the bottom wall and formed with a vertically extending right guide slot, and a left wall provided on a left side of the bottom wall and formed with a vertically extending left guide slot. A pressing member is provided in the refill body in a movable manner to press the sheet-type connected staples. The pressing member includes a guide shaft guided along the right and left guide slots. The guide shaft includes a right end portion protruding outside the right wall through the right guide slot, and a left end portion protruding outside the left wall through the left guide slot.