| 摘要 |
According to one embodiment, a charging device includes a charging roller and gap maintaining members. The charging roller includes a conductive roller to which charging voltage is applied and a coating layer as a member for covering the outer circumferential surface of the conductive roller, ends of the coating layer being further extended by predetermined length along an extending direction of the conductive roller than end faces of the conductive roller. The charging roller charges, in a non-contact manner, a photoconductive drum arranged near the charging roller with the charging voltage applied via the conductive roller. The gap maintaining members are respectively fixed at both ends of the charging roller in positions spaced apart from the ends of the charging roller. The gap maintaining members are set in contact with the photoconductive drum while keeping a predetermined charging gap between the coating layer and the photoconductive drum and rotate together with the charging roller according to the rotation of the photoconductive drum.
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