A CENTRIFUGAL BRAKE MECHANISM (23) BRAKES A SPOOL (12) ROTATABLY ATTACHED TO A REEL UNIT (1) BY MEANS OF CENTRIFUGAL FORCE. THE CENTRIFUGAL BRAKE MECHANISM (23) INCLUDES A ROTATION MEMBER (62), AT LEAST A BRAKE SHOE (64) AND A BRAKE DRUM (66). THE ROTATION MEMBER ROTATES AT LEAST IN CONJUNCTION WITH ROTATION OF THE SPOOL IN A FISHING-LINE RELEASING DIRECTION. EACH BRAKE SHOE INCLUDES FIRST AND SECOND ENDS (64A, 64B). EACH BRAKE SHOE IS PIVOTABLY ATTACHED TO THE ROTATION MEMBER ABOUT AN AXIS ARRANGED IN PARALLEL TO A SPOOL SHAFT (16) AND ARRANGED BETWEEN THE FIRST END AND A CENTER OF GRAVITY (GR). THE BRAKE DRUM IS DISPOSED INWARDS OF THE BRAKE SHOE (64) IN A ROTATION MEMBER RADIAL DIRECTION, AND INCLUDES AN OUTER PERIPHERAL SURFACE (66D) CONTACTABLE TO THE FIRST END OF THE PIVOTABLE BRAKE SHOE WITH DIFFERENT DIAMETERS. (FIG. 3)