A medical staple is provided with: a rectangular base portion and a needle portion that extends from one end of the base portion in a substantially arc shape so as to protrude in a predetermined direction with respect to the base portion, wherein the needle portion has a first bending position that is provided between a base connected at the one end and a distal end, and that yields first when a pressing force in a radially inward direction of an arc shape of the needle portion acts on the distal end, and a second bending position that is provided between the first bending position and the base, and that yields first when the pressing force acts in the vicinity of the base of the first bending position.
