For the purpose of performing temporary fastening and fastening by ligature thread loop without using snare, the ligature device (1) according to the present invention is a ligature thread (6) having one end formed with a loop (6a) contractable by knot and loop A lumen (7) penetrated by a folded portion (7) pulled by a folded portion (2)An insertion portion (4) having an insertion portion (3), an operating part (5) provided on a proximal end portion of an insertion part (4) and a fixing part (8a) having one end portion of a pull thread (7) fixed, and a first end of the pulling thread (7) is fixed and the other end is drawn in the first direction A movable member (9) capable of moving relative to the operating portion (5) is switched between the state and the second state in which the pulling of the ligature thread (6) and the pulling out of the thread (7) are simultaneously carried out in the second direction opposite to the first direction.スネアを用いることなく結紮糸ループによる仮締めと本締めとを行うことを目的として、本発明に係る結紮装置(1)は、結び目によって収縮可能なループ(6a)が形成された一端部を有する結紮糸(6)と、ループ(6a)に折り返し部分によって引っ掛けられる引き糸(7)とが貫通するルーメン(2,3)を有する挿入部(4)と、挿入部(4)の基端部側に設けられ、引き糸(7)の一端部が固定された固定部(8a)を有する操作部(5)と、引き糸(7)の他端部が固定され、他端部を第1の方向に牽引する第1の状態と、結紮糸(6)の牽引と引き糸(7)の繰り出しとを同時に第1の方向と逆方向の第2の方向に行う第2の状態とを切り替えて操作部(5)に対して相対的に移動可能な可動部材(9)とを備える。
