A fishing reel component includes a boss (17), a spring member (30), a lid member (31), a push button (32) and spring arrangement member (21). The boss (17) forms a boss through hole (17d) and a mounting space (17e). The spring member (30) is mounted in the mounting space (17e). The spring member (30) includes first and second engagement portions (30a,30b) arranged to oppose each other. The lid member (31) is fixed to the boss (17) to retain the spring member (30) and cover the mounting space (17e). The push button (32) includes a push operation portion (32a) and a plurality of tapered portions (32b). The tapered portions (32b) protrude from the push operation portion (32a) in the axial direction. The spring arrangement member (21) arranges the spring member (30) between the lid member (31) and the spring arrangement member (21). The spring arrangement member (21) includes a plurality of first through holes (21d) with each of the first through holes (21d) being configured for one of the tapered portions (32b) to pass therethrough.本發明之課題是在於針對藉由推壓按鈕之操作，能以單觸控來進行裝卸之捲線筒，縮短裝卸構造之軸方向長度。；用以解決課題之手段為：單軸承捲線器之捲線筒3是為對於具有形成於前端之環狀溝槽2b之捲線筒軸2，能以單觸控予以裝卸之零件，具備捲線筒本體5；及具有彈簧構件30、蓋構件31、推壓按鈕32、及軸承21之單觸控裝卸機構6。捲線筒本體5是具有：供捲線筒軸2貫通之貫通孔17d；與形成於捲線筒軸2貫通之端面的裝設空間17e。彈簧構件30是具有對向配置成可卡止於環狀溝槽之1對卡止部30a、30b，被裝設於裝設空間之構件。蓋構件是為了防止彈簧構件脫落，而以覆蓋裝設空間之方式，固定於捲線筒本體之構件。推壓按鈕是可朝軸方向自由移動地裝設於蓋構件，具有：由蓋構件之中心朝外側露出之按壓操作部32a；與軸方向突出而設置於朝按壓操作部，前端被插入至卡止部之間，且藉由軸方向之移動，擴大1對卡止部之間隔的方式，夾持軸構件而配置之前端細的1對錐形部32b，藉由按壓操作部之按壓操作，來解除軸構件的環狀溝槽與彈簧構件之卡合用的按鈕。軸承是具有可供1對錐形部各自通過之第1通過孔21d，將彈簧構件配置於與蓋構件之間的構件。
