Medical stapler system

A medical stapler system comprising:

• a medical stapler;
• and
• a staple that is configured to be deformed by the medical stapler to close tissue, wherein:
• the medical stapler includes:
• a first grasper and a second grasper that are pivotably connected to each other so as to open and close relative to each other and that have a longitudinal axis so that the tissue is grasped between the first and second graspers when in a closed state;
• a holder that retains the staple;
• a housing body that houses the holder while needles of the staple project from a first contact surface of the first grasper to be closely attached to the tissue when in the closed state;
• and
• a drive mechanism that is configured to slide the holder in the housing body along the longitudinal axis, wherein
• the second grasper has a second contact surface that grasps the tissue between the first contact surface and the second contact surface when in the closed state, and
• a recessed portion that is formed on the second contact surface and that houses the needles without causing penetration or deformation when the closed state is created and the holder is positioned on one side in the longitudinal axis direction, and
• an anvil against which the needles are pushed and deformed when the closed state is created and the holder is positioned on the other side in the longitudinal axis direction.