Valve-operating assembly of driven rotation member and cam

In a valve-operating assembly of a driven rotation member and a cam, including a hub (30) rotatably carried on a support shaft, a cam (24) formed on an outer periphery of one end of the hub, and a driven rotation member (25) coupled to one end of the cam; the cam and the hub are integrally formed of a sintered alloy; the cam has a recess defined in one end face thereof; and the driven rotation member is made of a synthetic resin, and mold-coupled to the cam and the hub so that the recess is filled with the synthetic resin of the driven rotation member and an outer periphery of the hub is wrapped with the synthetic resin. Thus, it is possible to provide the valve-operating assembly of the driven rotation member and the cam, which is lightweight and excellent in lubrication of the cam and the hub.