In a spool brake device for a double-bearing type fishing reel, a plurality of removal preventive flange portions provided at regular intervals in the outer peripheral portion of an annular brake member including a brake part for the present spool brake device are disposed opposed to portions existing midway between a plurality of engaging portions which are respectively formed in a side plate, and the removal preventive flange portions are rotated by an operation part and are thus engaged with the engaging portions in a removal preventive manner to thereby mount the annular brake member into the side plate. Also, an engaging uneven portion is formed in the inner periphery of one of the annular brake member and side plate, while an elastically engaging member elastically engageable with the engaging uneven portion is provided in the other, whereby the moderation of rotation due to elastic resistance is applied to the annular brake member in the rotation direction thereof to thereby be able to ensure the control of the brake force.
