A spool device includes a spool shaft and a spool. The spool shaft is rotatably mounted to the reel body. The spool is mounted to the spool shaft. The spool device has a notch part and a protruding portion. The notch part is disposed on one of the spool and the spool shaft. The notch part is formed in an axial direction of the spool shaft. The protruding portion is disposed on the other of the spool or the spool shaft. The protruding portion is configured to engage the notch part.可以將釣魚用捲線器的捲筒單元容易地組裝。本捲筒單元(9),是由捲筒軸(20)、及捲筒(14)所構成。捲筒軸(20),是可旋轉自如地設於捲線器本體(11)。捲筒(14),是被裝設於捲筒軸(20)。捲筒單元(9),是具有:切口部(114)、及突出部(116)。切口部(114),是設於捲筒(14)及捲筒軸(20)的其中任一方。切口部(114),是朝沿著捲筒軸(20)的方向被切口。突出部(116),是設於捲筒(14)及捲筒軸(20)的其中任一另一方。突出部,是卡合於切口部(114)。9‧‧‧捲筒單元14‧‧‧捲筒14a‧‧‧凸緣部14b‧‧‧捲線胴部14c‧‧‧連結部14d‧‧‧軸裝設部20‧‧‧捲筒軸20a‧‧‧大徑部64d‧‧‧插入孔114‧‧‧切口部114a‧‧‧開口端部114b‧‧‧第1抵接部114c‧‧‧第2抵接部115‧‧‧軸本體部116‧‧‧突出銷120‧‧‧被裝設部120a‧‧‧銷安裝孔
