A spinning reel capable of delivering fishing line in the forward direction, the spinning reel comprising: a reel body whereto a handle is rotatably supported, a rotor that is supported by the reel body to rotate around the longitudinal axis of the reel body that is offset from an axis of rotation of the handle, and a spool that is supported by the reel body to move in the direction of the longitudinal axis of the reel body, and the spool being arranged to have the fishing line wound thereon by the rotor, the rotor including a rotor body having a cylindrical coupling portion that is rotatably supported by the reel body, a first rotor arm that extends forward from a rear end portion of the coupling portion while being spaced apart from the coupling portion and having a pair of first side portions (30d, 30e), and a second rotor arm that extends forward from the rear end portion of the coupling portion while being spaced apart from the coupling portion and having a pair of second side portions (30f, 30g), a first cover member that is detachably mounted to the rotor body and covering a radially outer side of the first rotor arm, a first guard member that is detachably mounted to the rotor body and having a first guard portion that covers at least a portion of a boundary between an outside surface of the coupling portion and a rear end surface of the coupling portion, and a fishing line guide portion that is pivotally coupled to the extreme ends of the first rotor arm and the second rotor arm, the fishing line guide portion being arranged to wind fishing line onto the spool, characterized in that the spinning reel further comprising a second guard member that is detachably mounted to the rotor body and having a second guard portion that covers at least a portion of a boundary between the outside surface of the coupling portion and the rear end surface of the coupling portion at a position that opposes the first guard portion, the first guard member having a third guard portion that covers at least a portion of a boundary between the first cover member and one of the first side portions (30e, 30d) of the first rotor arm, and the second guard member having a fourth guard portion that covers at least a portion of a boundary between the first cover member and the other first side portion (30e, 30d) of the first rotor arm. a reel body whereto a handle is rotatably supported, a rotor that is supported by the reel body to rotate around the longitudinal axis of the reel body that is offset from an axis of rotation of the handle, and a spool that is supported by the reel body to move in the direction of the longitudinal axis of the reel body, and the spool being arranged to have the fishing line wound thereon by the rotor, the rotor including a rotor body having a cylindrical coupling portion that is rotatably supported by the reel body, a first rotor arm that extends forward from a rear end portion of the coupling portion while being spaced apart from the coupling portion and having a pair of first side portions (30d, 30e), and a second rotor arm that extends forward from the rear end portion of the coupling portion while being spaced apart from the coupling portion and having a pair of second side portions (30f, 30g), a first cover member that is detachably mounted to the rotor body and covering a radially outer side of the first rotor arm, a first guard member that is detachably mounted to the rotor body and having a first guard portion that covers at least a portion of a boundary between an outside surface of the coupling portion and a rear end surface of the coupling portion, and a fishing line guide portion that is pivotally coupled to the extreme ends of the first rotor arm and the second rotor arm, the fishing line guide portion being arranged to wind fishing line onto the spool, characterized in that the spinning reel further comprising a second guard member that is detachably mounted to the rotor body and having a second guard portion that covers at least a portion of a boundary between the outside surface of the coupling portion and the rear end surface of the coupling portion at a position that opposes the first guard portion, the first guard member having a third guard portion that covers at least a portion of a boundary between the first cover member and one of the first side portions (30e, 30d) of the first rotor arm, and the second guard member having a fourth guard portion that covers at least a portion of a boundary between the first cover member and the other first side portion (30e, 30d) of the first rotor arm.