Various embodiments provide a fishing reel having a light-weight, compact and easy-to-assemble magnetic seal mechanism which allows greater freedom in material selection of the rotating member. A fishing reel according to one embodiment comprises a rotating body rotatably supported via a ball bearing and a magnetic seal mechanism for sealing the ball bearing. In one aspect, the magnetic seal mechanism comprises a magnet disposed in parallel with either a magnetic inner or outer ring of the ball bearing, and magnetic fluid disposed between the magnet and said inner or outer ring, magnetic fluid being retained by a magnetic circuit formed therebetween to seal space defined between the magnet and said inner or outer ring.本發明的課題為提供一種釣魚用捲線器，具有可高度地確保旋轉體的材料選擇的自由度，謀求省空間化，並且組裝作業性佳的輕量的磁性密封機構，可抑制磁性密封機構的磁性流體因離心力而飛散。本發明的解決手段為一種釣魚用捲線器，具有：透過滾珠軸承27可旋轉地被支撐之旋轉體23；密封滾珠軸承27之磁性密封機構35。磁性密封機構35具有：並設於滾珠軸承27的具有磁性的內環27a之磁鐵40；透過被保持在配置於磁鐵40與滾珠軸承27的外環27b之間且形成於其間的磁路，密封其間的空間(間隙)s之磁性流體42。而且，在磁性流體42因伴隨轉子等的旋轉產生的離心力所能飛散的方向F1、F2，在磁鐵40的磁力作用的範圍內配設有用以承受飛散的磁性流體42的承受部70、72。
