It is an object of the present invention to prevent loosening of a screw member for fixing a handle arm onto a handle shaft in a fishing reel. The present fishing reel includes a reel unit, a handle shaft, a handle arm, a handle knob, a nut, and an anti-loosening member. The handle shaft includes an anti-loosening engaging portion. The handle arm includes an elongated hole The handle shaft is inserted in the elongated to be non-rotatably engaged with the handle arm. A position of the shaft in the elongated hole is adjustable. The anti-loosening member is configured on the nut member and is selectively set in a first position and a second position. The anti-loosening member is engaged with the anti-loosening engaging portion in the first position to prevent the nut member from loosening, and is disengaged from the anti-loosening engaging portion in the second position to allow the nut member to rotate in the loosening direction.對於釣魚用捲線器,防止將操作桿臂固定在手把軸用的螺栓構件鬆緩。此釣魚用捲線器,是具備:手把軸(8)、及操作桿臂(10)、及螺帽構件(12)、及止動器(24)。手把軸(8)是在先端部具有齒輪部(15)。操作桿臂(10),是具有卡合有手把軸(8)的長孔(10c),可由沿著長孔(10c)的任意的位置將手把軸(8)固定。螺帽構件(12),是具有與手把軸(8)的公螺紋部(16)螺合的母螺紋部(21c),將操作桿臂(10)安裝在手把軸(8)的先端部。止動器(24),是設在螺帽構件(12),可取得:卡合於手把軸(8)的齒輪部(15)且禁止螺帽構件(12)的鬆脫方向的旋轉的第1姿勢、及與齒輪部(15)的卡合被解除且容許螺帽構件的鬆脫方向的旋轉的第2姿勢。10‧‧‧操作桿臂12‧‧‧螺帽構件15‧‧‧齒輪部(鬆脫防止用卡合部)21‧‧‧本體部21a‧‧‧台座部21b‧‧‧側壁部22‧‧‧操作桿部22a‧‧‧支撐部22b‧‧‧轂部22c‧‧‧連結部23‧‧‧銷24‧‧‧止動器(鬆脫防止構件)24a‧‧‧爪26‧‧‧銷27‧‧‧板彈簧
