PROBLEM TO BE SOLVED: To provide a tissue ligation device that can form a knot more stably.SOLUTION: The tissue ligation device to which a suture is attached and which is used for tissue ligation, includes: a thread-stopping member 30 having a receptacle 33 which is attached to the suture and into which a part of the suture can be inserted; and a projection part 34 for preventing the suture having been inserted into the receptacle 33 from being dislodged therefrom.【課題】より安定して結び目を形成することができる組織結紮デバイスを提供する。【解決手段】縫合糸が取り付けられて組織の結紮に用いる組織結紮デバイスは、縫合糸に取り付けられ、縫合糸の一部を挿通可能な収容部33を有する糸止め部材30と、収容部33に挿通された縫合糸が収容部33から抜けるのを抑制する突起部34とを備えることを特徴とする。【選択図】図2