A fishing reel handle assembly has a handle arm, a knob shaft, and a handle knob. The handle arm is relatively non-rotatably attached to a distal end of the handle shaft. The knob shaft is fixed to an end of the handle arm and extends in parallel to the handle shaft. The handle knob is supported by the knob shaft to be rotatable relative to the handle arm. The handle arm includes a main body and a convexo-concave portion. The main body extends substantially perpendicular to an axial direction of the handle shaft, and is formed by laminating sheets of prepreg. The convexo-concave portion is convexly or concavely formed on at least either a front surface of the main body or a back surface of the main body. The front surface allows the handle knob to be attached thereto, the back surface disposed opposite to the front surface.
