A present dual-bearing reel spool braking device is configured to apply a braking force to a spool that is rotatably mounted on a reel body with a centrifugal force. The spool braking device includes a rotating member, a brake shoe, a brake drum, and a selective fixing member. The rotating member rotates in conjunction with the rotation of the spool. The brake shoe is supported by a rotating member so as to be pivotal between a braking position where the brakes are applied to the spool with a centrifugal force and a non-braking position where a non-braking rotation of the spool is allowed. The brake drum is configured to come into contact with the brake shoe. The selective fixing member is mounted to the rotating member. The selective fixing member selectively fixes the brake shoe to the non-braking position by selectively engaging with the brake shoe.