A drag adjusting device for a dual-bearing reel, including a reel unit with a drag operating member configured to pivot within a range between a minimum position and a maximum position. A plate member is attached to an outer side of the reel unit. A drag restricting member is detachably coupled to the outer side surface of the plate member and between the minimum and the maximum pivot position of the drag operating member. The drag restricting member is detachably coupled to the plate member so as to contact and restrict pivotal movement of the drag operating member.