The yarn fixing device includes a first fixing member having a screw hole and a first holding surface, a second fixing member having a second holding surface, screwed into the first fixing member, a first fixing member and a A thread locking portion provided so as to protrude from either one of the two fixing members, a tubular insertion portion having flexibility attached to either one of the thread locking portion and the distal end portion, An operation member connected to the other of the fixing member and the second fixing member, and an operation portion connected to a base end portion of the operation member, wherein the first fixing member and the second fixing member are provided on the first holding surface And the second holding surface are arranged to face each other in the axial direction of the insertion portion, and when the operation portion is operated to relatively rotate the insertion portion and the operation member, the second fixing member is screwed to the first fixing member So that the first holding surface and the second holding surface come close to each other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から突出して設けられた糸係止部と、前記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ている。
