A brake device for a dual bearing real, includes a one-way clutch, an operating member and a pressing member. The one-way clutch has an inner race, an outer race and a rolling element, and receives rotation of a spool shaft only in a fishing-line casting direction through the outer race. The outer race is disposed on the outer peripheral side of the inner race, and is rotatable with respect to a reel unit. The rolling element is disposed between the inner race and the outer race. The operating member is disposed on the outer peripheral side of an end of the spool shaft, and is engaged with the reel unit so as to be movable in a spool shaft direction. The pressing member is configured to press the outer race. The outer race is restricted from moving oppositely to the pressing member in the spool shaft direction.