Provided is an endoscopic suture ligation tool capable of satisfactorily ligating a suture. The present invention has a ligating loop (11a) through which a suture (4) is passed, a linking loop (11b) to which a ligation device (2) is linked, a connecting part connecting the ligating loop (11a) and the linking loop (11b), a tube (12) slidably fitted over the connecting part so that the ligating loop (11a) is drawn into the lumen of the tube (12) by the sliding of the tube (12) toward the ligating loop (11a), and a locking means (13) for locking part of the ligating loop (11a) so that the ligating loop (11a) does not slip out from the inside of the tube (12).
