The thread fixing tool includes a first fixing member having a screw hole and a first clamping surface, a second fixing member having a second clamping surface and screw-fitted to the first fixing member, a first fixing member, and a first fixing member. A flexible tubular insertion portion with one of the two fixing members attached to the tip, and an operation inserted through the insertion portion and connected to the other of the first fixing member and the second fixing member A first fixing member and the second fixing member are opposed to each other in the axial direction of the insertion portion. When the operating portion is operated and the insertion portion and the operating member are rotated relative to each other, the second fixing member is screw-fitted with the first fixing member, so that the first clamping surface and the second clamping surface are When the predetermined operation is performed on the operation unit, the operation member and any of the above are configured. Is configured to coupled is released with the direction. 糸固定具は、ネジ穴および第一挟持面を有する第一固定部材と、第二挟持面を有し、第一固定部材とネジ嵌合される第二固定部材と、第一固定部材および第二固定部材のいずれか一方が先端部に取り付けられた、可撓性を有する管状の挿入部と、挿入部に挿通され、第一固定部材および第二固定部材のいずれか他方と連結された操作部材と、操作部材の基端部に接続された操作部とを備え、第一固定部材および前記第二固定部材は、第一挟持面と第二挟持面とが挿入部の軸線方向において対向するように配置され、操作部を操作して挿入部と操作部材とを相対回転させると、第二固定部材が第一固定部材とネジ嵌合することにより第一挟持面と第二挟持面とが接近するように構成され、操作部に所定の操作を行うと、操作部材と前記いずれか他方との連結が解除されるように構成されている。
