A rotor brake mechanism 6, and a spinning reel (100, Fig 1) incorporating the mechanism, includes a braking member 21 disposed in a reel body 1a, a moving member 15, an elastic member 22 (e.g. a rubber cap), and an adjustment member 23 (e.g. a spring). The moving member is disposed in a rotor to move between a first position corresponding to a line-winding posture and a second position corresponding to a line-releasing posture, in conjunction with a bail arm (4, Fig 1), and includes an extended portion 15a that extends toward the braking member when the moving member moves to the second position; the elastic member being disposed upon it such that it comes into contact with an outer peripheral surface of the braking member when the moving member moves to the second position. The adjustment member is disposed between the extended portion of the moving member and the elastic member, and adjusts a position of the elastic member.
