A spinning reel includes a handle (1), a reel unit (2), a rotor (3), a spool (4), a spool shaft (15), and an oscillating mechanism (6). The oscillating mechanism includes a traverse cam shaft (21) and a slider (22) including a slider body (24), a through hole (24f), an engaging member (25), a first bearing (26), and a retainer member (27). The slider body (24) is coupled to the spool shaft (15). The engaging member (25) has a shaft part (25a) and an engaging part (25b). The engaging part is mounted to a tip end of the shaft part to be engaged with helical grooves (21a). The first bearing (26) has a fitted part (26a), a protruding part (26b), and a support hole (26c). The fitted part (26a) is fitted into the through hole (24f). The protruding part (26b) has a diameter smaller than a diameter of the fitted part (26a). The fitted part (26a) includes a stepped surface (26g) on an end thereof abutting the protruding part (26b). The retainer member (27) retains the first bearing (26) at the stepped surface (26g).
