The thread fixture has a cylindrical body having an inner wall surface and a fixed portion having an outer peripheral surface supported on the inner wall surface of the tubular body by being moved relative to the cylindrical body.The fixing portion has a holding portion capable of holding the thread used for the treatment.When at least a part of the outer peripheral surface of the fixed portion is supported on the inner wall surface of the tubular body in the state in which the thread is disposed in the holding portion of the fixing part, the thread is held between the inner wall surface of the tubular body and the outer peripheral surface of the fixing portion, and the yarn is held by the holding portion.Therefore, the fixing portion of the thread fixing tool and the cylindrical body are fixed.糸固定具は、内壁面を有する筒状体と、筒状体に対して移動されることで筒状体の内壁面に支持される外周面を有する固定部とを有する。固定部は、処置に用いられる糸を保持可能な保持部を有する。固定部の保持部に糸を配置した状態で筒状体の内壁面に固定部の外周面の少なくとも一部が支持されると、筒状体の内壁面と固定部の外周面との間に糸を係止するとともに、保持部で糸を保持させる。このため、糸固定具の固定部及び筒状体は、糸を固定する。
