A cover open mechanism of a dual-bearing reel includes a frame, a first side cover, a spool support portion and a cover opening and closing portion. The cover opening and closing portion includes a cover opening and closing structure and an urging member. The cover opening and closing structure is engaged with the spool support portion and the first side cover, and sets an opened/closed state of the first side cover. The urging member is disposed between the first side cover and the cover opening and closing structure, and urges the first side cover in an openable state. The first side cover is configured to be prevented from rotating when any one of the first side cover and the spool support portion is engaged with the other of the first side cover and the spool support portion.
