A dual-bearing reel includes a reel unit, a spool, a spool shaft, a handle, and an attachment-detachment operating part, a lock member. The reel unit includes a frame having a first side plate and a second side plate. The attachment-detachment operating part has a protruding portion protruding towards the first side plate from a position away from an axis of the spool shaft. The first side cover is attachable to and detachable from the first side plate when the attachment-detachment operating part is at a first position. The first side cover is non-attachable to and non-detachable from the first side plate when the attachment-detachment operating part is at a second position. The lock member has an engaging groove. The engaging groove is allowed to be engaged with the protruding portion.