A drag adjusting mechanism (7) for a dual-bearing reel comprises a drag adjusting lever (2), a cam mechanism (43), and a rotation restricting portion (44). The drag adjusting lever (2) rotates about a spool shaft (5) between a drag release position and a maximum drag position. The cam mechanism (43) has a cam surface (49) that converts rotation of the drag adjusting lever (2) into axial movement of the drag mechanism (7) along the axial direction of the spool shaft (5). The rotation restricting member (44) is provided on the cam surface (49) and regulates rotation of the drag adjusting lever (2) to the drag release position. The rotation restricting member (44) has a protrusion (44a) with an apex (44b), a first slanted surface (44c) extending from the apex (44b) toward a first position (B) corresponding to a drag release position, and a second slanted surface (44d) extending from the apex (44b) in the direction opposite to the drag release position. The angle (±) of the first slanted surface (44c) is smaller than the angle (²) of the second slanted surface (44d).