PROBLEM TO BE SOLVED: To provide a medical suture instrument in which workability and operability are greatly improved.SOLUTION: A suture instrument 100, by means of a loop feedback mechanism 30 and a suture thread feeding mechanism 40, propagates the movement of a binding member holding part 10 to a loop forming part 80 and a suture thread 1, delivers a loop 82 from the tip end of a loop introducing needle 60, and delivers the suture thread 1 from the tip end of a suture thread introducing needle 70.COPYRIGHT: (C)2014,JPO&INPIT【課題】作業性及び操作性を大幅に向上させた医療用縫合具を提供する。【解決手段】縫合具100は、ループ送り戻し機構30及び縫合糸送り機構40によって、締結部材保持部10の動きをループ形成部80及び縫合糸1に伝達し、ループ82をループ導入用針60の先端から送り出し、縫合糸1を縫合糸導入用針70の先端から送り出すものである。【選択図】図3