A bioabsorbable staple (1) which is hard to break when indwelling in a living body is provided. A staple (1) formed of a biodegradable metallic material, wherein the staple (1) comprises two penetrating parts (2) for piercing the living tissue, a bridging part (3) straddling the suturing part, the stitch (4) for connecting the entrance (2) and the bridging portion (3), wherein the connecting portion (4) is formed in a shape including a curved portion having no bending point, and the connecting portion (1) in which at least a part of the erected part (3) is positioned on the distal end side of the insertion part (2) from the line connecting the top part (41) and the top part (41) of the insertion part (4) provide.生体内に留置した際に、破断し難い生体吸収性ステープル(1)を提供する。生分解性金属材料で形成したステープル(1)であって、前記ステープル(1)は、生体組織に刺し込む2本の刺入部(2)、縫合箇所を跨る架設部(3)、前記刺入部(2)と前記架設部(3)を連結する連結部(4)を含み、前記連結部(4)は、屈曲点を有しない湾曲部を含む形状に形成され、且つ、前記連結部(4)の頂部(41)と頂部(41)を結んだ線より、前記架設部(3)の少なくとも一部が刺入部(2)の先端側に位置する生体吸収性ステープル(1)を提供する。
