The drag adjusting device is provided with a pin member 70 arranged on a plate-like member 80 of a reel unit 1 such that it can be attached to and detached and such that its position can be changed. The pin member 70 serves to remember a prescribed pivot position of a drag mechanism operating member 2. When an angler finds an optimum drag lever position, the angler installs the pin member 70 in a mounting recess 81 corresponding to the optimum drag lever position. In this way, the angler can easily set the drag mechanism operating member 2 to the optimum drag lever position without having to remember the drag lever position.