A spinning reel includes a reel body, a handle, a spool shaft, a spool, a rotor, a rotor driving mechanism, and an oscillating mechanism configured to rotate in conjunction with the handle and cause the spool to reciprocate via the spool shaft. The oscillating mechanism includes a threaded shaft having a spiral groove and is configured to rotate in conjunction with the rotation of the handle. A slider is engaged with the spiral groove of the threaded shaft, and is configured to reciprocate in conjunction with rotation of the threaded shaft. A guide shaft has a rear end disposed in the through-hole arranged in the rear portion of the reel body, and is locked so as to prevent the shaft from disconnecting from by the reel body, and is configured to guide the reciprocation of the slider. An annular elastic member is disposed between the through-hole and the guide shaft.