A drag knob for regulating drag force of a drag mechanism configured to brake rotation of a spool rotatably mounted to a reel unit of a fishing reel includes an operating member, a coil spring, a receiver member, and a slide member. The operating member is rotatably mounted to the reel unit. The coil spring extends and contracts in a rotary axis direction of the operating member in conjunction with rotation of the operating member. The receiver member is configured to receive urging force of the coil spring and apply drag force to the spool. The slide member is disposed between the coil spring and the receiver member in the rotary axis direction. The slide member has a friction coefficient less than a friction coefficient of the receiver member.[課題]對於牽引力調整鈕及釣魚用捲線器，即使軸方向的剖面是矩形狀的捲簧也可防止變形。[技術內容]具備：可旋轉地設於捲線器本體(2)的操作構件(67)、及藉由操作構件(67)的旋轉朝操作構件(67)的旋轉軸方向伸縮的捲簧(73)、及承接由捲簧(73)所產生的推迫力朝捲筒(4)賦予牽引力的承接構件(66)、及在旋轉軸方向中被配置於捲簧(73)及承接構件(66)之間且摩擦係數比承接構件(66)小的滑動構件(63)。
