PROBLEM TO BE SOLVED: To provide a locking tool which is prevented from being loosened even if a knob part is pulled.SOLUTION: A locking tool 100 configured to be easily attached to and detached from a rod-like member P has a spiral body (a first arm portion 110 and a second arm portion 120) which goes around the rod-like member nearly once at a prescribed interval in an axial direction, and can be elastically deformed in a spreading direction, and knob portions (a first knob portion 130 and a second knob portion 140) which are provided at the end portions (a first outside end portion 112 and a second outside portion 122) of the spiral body and on which a string, a rope, or the like can be hooked. The spiral body includes three abutting portions (a connection portion 111, a first abutting portion 113 and a second abutting portion 123) mutually arrayed in a V shape so that they sandwich the inside space. The three abutting portions are arranged inside other parts of the three abutting portions, the rod-like member P is configured so that it can be sandwiched by the three abutting portions, and the three abutting portions and the end portions are arranged at positions different from one another.COPYRIGHT: (C)2015,JPO&INPIT【課題】 摘み部分が引っ張られても緩み難くすることができる係止具を提供する。【解決手段】 棒状部材Pに着脱容易に構成された係止具100は、軸線方向に所定間隔を空けて軸線回りに略1回転周回しており、広がる方向に弾性変形可能な螺旋体(第1腕部110と第2腕部120)と、螺旋体の端部(第1外側端部112と第2外側端部122)に設けられ、紐やロープ等を引っ掛け可能な摘み部分(第2摘み部130と第2摘み部140)とを有しており、螺旋体は内側空間を挟んで交互にV字状に配列された3つの当接部(連結部111と第1当接部113と第2当接部123)を含んでおり、前記3つの当接部が前記螺旋体の他の部分より内側に配置されており、前記3つの当接部で棒状部材Pを狭持可能に構成されており、前記3つの当接部と前記端部とが互いに異なる位置に配置されていることを特徴とする。【選択図】図2