A clutch mechanism includes a clutch pin, a pinion gear, a first bearing, a second bearing and a clearance adjusting part. The pinion gear is axially movable to an on-position that causes the pinion gear to engage with the clutch pin and be unitarily rotatable with the spool shaft and an off-position that causes the pinion gear to disengage from the clutch pin. The first bearing is disposed on an outer peripheral surface of a first support part of the pinion gear. The second bearing is disposed on an outer peripheral surface of a second support part of the pinion gear. The clearance adjusting part is configured to partially reduce a clearance between an inner peripheral surface of a through hole and the outer peripheral surface of the spool shaft at the clearance adjusting part in an on-state of the clutch mechanism.
