In a spinning reel, a traverse camshaft 21 is arranged to engage with an engaging member used to cause a bail arm and a spool to undergo a relative reciprocal movement. The traverse camshaft 21 has a shaft body 37 and a cam groove 38. The shaft body 37 is arranged to rotate in coordination with rotation of a handle assembly in at least a line reel-in direction. The cam groove 38 is formed in an external circumferential surface of the shaft body 37 and configured to engage with the engaging member. The cam groove 38 is also configured to intersect itself. The cam groove 38 has a first groove sections 38b arranged rotationally downstream from an intersecting portion 38a and a second groove sections 38c that is wider than the first groove sections 38b and arranged rotationally upstream from an intersecting portion 38a.抑制卡合構件的多餘的轉動並抑制異音的發生及觸感的劣化。橫向凸輪軸(21),是卡合於使紡車式捲線器的導環臂及捲筒相對地往復移動所使用的卡合構件。橫向凸輪軸(21),是具備:軸本體(37)、及凸輪溝(38)。軸本體(37),是可與操作桿組裝體的至少線捲取方向的旋轉連動而旋轉。凸輪溝(38),是在軸本體(37)的外周面卡合於卡合構件的方式交叉形成,在交叉部分(38a)中,具有:配置於軸本體(37)朝線捲取方向旋轉時交叉部分(38a)的旋轉方向下流側的第1溝部(38b)、及配置於交叉部分(38a)的旋轉方向上流側且比第1溝部(38b)溝寬度更寬的第2溝部(38c)。21...橫向凸輪軸37...軸本體37b...後支撐部37c...錐面附階段部37d...齒輪支撐部37e...前支撐部38...凸輪溝38a...交叉部分38b...第1溝部38c...第2溝部38d...第3溝部38e...第4溝部
