A spinning reel rotor is rotatively mounted onto a reel unit of a spinning reel and winds fishing line onto a spool. The rotor is provided with a cylindrical portion, a bail arm, and first and second rotor arms having first and second cover members. The cylindrical portion is rotatively mounted to an end of the reel unit. The first and second rotor arms extend in the direction away from the reel unit from diametrically opposing positions of the reel unit side end portion of the cylindrical portion. The second cover member covers the outside of the second rotor arm and has a plurality of through holes formed in its outside surface. In a spinning reel rotor to which cover members are mounted, it is possible to inexpensively prevent the rotor from being scratched such that its appearance can be maintained without losing the classic look of the reel.