Staple cartridge and stapler

A staple cartridge, on which a refill is configured to be mounted, the refill including:

• a refill main body configured to accommodate therein a plurality of staple sheets in a stacked state and having a discharging port for discharging the staple sheets;
• and a staple presser configured to be placed on the stacked staple sheets so as to move in a stacking direction of the staple sheets as the staple sheets are discharged through the discharging port and an amount of the staple sheets is reduced, the staple cartridge comprising:
• a mount portion, on which the refill is configured be removably mounted;
• and
• a displacement member provided on the mount portion and configured to abut against the staple presser to be displaced in accordance with a position of the staple presser in a state where the refill is mounted on the mount portion,
• wherein the staple presser includes an engaging portion configured to be engaged in a receiving portion of the refill main body formed along the stacking direction, and the engaging portion is configured to be movable in the stacking direction as the engaging portion moves along the receiving portion, and
• wherein in the state where the refill is mounted, the displacement member is configured to abut against the engaging portion to be displaced in accordance with the position of the engaging portion.