An object of the present invention is to prevent moisture from intruding into the spool from the gap between the adjustment member and the spool. The spinning reel 100 includes a reel body 2, a spool shaft 3, a spool 4, a brake mechanism 20, an adjustment member 30, and a waterproof structure 40. The spool 4 includes: a spool main body portion 4a； and a front wall portion 4b, which is provided on the front side of the spool main body portion 4a and has a larger diameter than the outer diameter of the spool main body portion 4a； and is rotatably supported by the spool shaft 3. The adjustment member 30 has an opposing wall portion 30b that is opposed to the front wall portion 4b of the spool 4 in the axial direction, and is rotatably attached to the front end of the spool shaft 3 with a gap therebetween. The waterproof structure 40 is provided on the front wall portion 4b of the spool 4, and has: an annular convex portion 40a that protrudes from the front wall portion 4b toward the opposing wall portion 30b； and an annular concave portion 40b that faces the self-facing wall portion The recess 30b is recessed in the direction away from the spool shaft 3 in the diameter direction outside the annular convex portion 40a.本發明之課題在於抑制水分自調整構件與捲線筒之間隙侵入至捲線筒內部。紡車式捲線器100具備捲線器本體2、捲線筒軸3、捲線筒4、剎車機構20、調節構件30、及防水構造40。捲線筒4具有：捲線主體部4a；及前方壁部4b，其設置於捲線主體部4a之前側且直徑較捲線主體部4a之外徑大；且可旋轉地支持於捲線筒軸3。調節構件30具有於軸方向上與捲線筒4之前方壁部4b對向之對向壁部30b，與捲線筒4隔開間隙而可旋動地安裝於捲線筒軸3之前端。防水構造40設置於捲線筒4之前方壁部4b，且具有：環狀凸部40a，其自前方壁部4b朝對向壁部30b突出；及環狀凹部40b，其向自對向壁部30b離開之方向凹陷，設置於較環狀凸部40a更靠捲線筒軸3之直徑方向外側。
