A spool braking device of a fishing reel according to an embodiment of the present disclosure includes a spool rotatably mounted on a reel body on which a fishing line at one end of which a lure is attached is wound so as to be unwound, a spool brake that is provided on the spool and the reel body and that brakes the spool, and a spool braking force controller connected to the spool brake and capable of controlling a braking force by the spool brake, wherein the spool braking force controller is configured to change the braking force by the spool brake based on a set value of the braking force corresponding to the lure information.