A dual-bearing reel includes a reel body and an attachment/detachment mechanism. The attachment/detachment mechanism includes an attachment/detachment operation portion, a first locking member and a second locking member. The first locking member is located on a side plate of the reel body. The second locking member is swingable relative to the first locking member. The attachment/detachment mechanism is configured to permit or restrict rotation of the attachment/detachment operation portion relative to the side plate by using the first locking member and the second locking member. When the attachment/detachment operation portion is operated to rotate while the second locking member is at a rotation-restricting position, an engagement portion presses an engaged portion such that swinging of the second locking member from the rotation-restricting position to a rotation-permitting position is restricted.