Provided is a bait casting reel including braking magnets that provide braking force against rotation of a spool using magnetic force to prevent backlash of the spool in casting. The bait casting reel allows a user to minimally space a spool and an anti-backlash unit to set the maximum braking force of a braking magnet by bringing the spool and the anti-backlasher in contact with each other when a braking dial for moving the anti-backlasher left and right in the longitudinal direction of the spool is turned to the maximum, in order to prevent the braking magnet from being worn or damaged by coming in contact with the spool due to deformation of the rotary shaft of the spool or a friction washer and to allow the user to freely and easily adjust the braking force of the braking magnet without replacing a part.
