The rear drag operation structure includes a knob mounting portion, a first rear drag knob, and a second rear drag knob. The knob mounting portion includes a tubular portion that projects rearward from the rear portion of the reel unit, and a male threaded portion formed on the outer peripheral surface of the tubular portion. The first rear drag knob is mounted on the rear end portion of the knob mounting portion. The second rear drag knob includes lever members that are disposed between the rear portion of the reel unit and the front portion of the first rear drag knob, and a nut member that is mounted on the lever members so as to be not rotatable but moveable forward and backward relative thereto, and is screwed onto the male threaded portion of the knob mounting portion.