Handle knob for a fishing reel

A handle knob for a fishing reel is mounted on a knob shaft to be rotatable about an axis of the knob shaft, and is fixed to an operation body rotatably combined with a reel body. The handle knob includes an inner knob, an outer knob integrally formed therewith, and bearings having an inner ring fitted to the outer surface of the knob shaft and an outer ring fitted to the inner surface of the inner knob, and that rotatably support the inner knob on the knob shaft about the axis. The inner knob includes a bearing surface with which the outer ring contacts, and the bearing surface including a through-hole having an opening in the bearing surface while penetrating the inner knob in a radial direction and through which an insertion portion of the outer knob is inserted.