To provide a conductive roll which suppresses filming of an electrifying member and/or a photoreceptor and improves distortion characteristic of the electrifying member so that a stripe defect can be suppressed, and to provide an image forming apparatus equipped with the conductive roll, and a method and a device for manufacturing the conductive roll.

The conductive roll 100 has a conductive elastic layer 10 concentrically on an outer periphery of a layer forming portion 20a of a core bar 20 that is a conductive shaft center, and electrifies a body to be electrified while coming into contact with the body to be electrified in such a state that voltage is applied thereto. In the conductive roll 100, hardness of the conductive elastic layer 10 has hardness gradient g1 in a thickness direction T, and the hardness is high on the conductive shaft center side of the conductive roll 100 and becomes lower toward a surface side of the conductive roll 100.