Charging device and image forming apparatus

An image forming apparatus, comprising:

• a rotatable photosensitive member;
• a charging device including a first charging member formed by winding a base material, which is provided with conductive fibers in a brush-like form, around an outer peripheral surface of a core material, the first charging member being rotatable while the conductive fibers contact the photosensitive member, and a second charging member formed by winding a base material, which is provided with conductive fibers in a brush-like form, around an outer peripheral surface of a core material, the second charging member being rotatable while the conductive fibers contact the photosensitive member, at a position located downstream of the first charging member in a rotation direction of the photosensitive member, the charging device electrically charging the photosensitive member;
• a power supply configured to apply a voltage to the charging device;
• an exposure device configured to cause a surface of the photosensitive member electrically charged by the first charging member and the second charging member and hence to form an electrostatic latent image;
• a developing device configured to develop the electrostatic latent image formed on the surface of the photosensitive member, by using a toner;
• and
• a driving mechanism configured to rotationally drive the first charging member and the second charging member so that, when the first charging member and the second charging member electrically charge the rotating photosensitive member, a region on the surface of the photosensitive member facing a seam, which is formed by mutually adjacent edges of the base material of the first charging member at a contact part between the first charging member and the photosensitive member, is not superposed on a region on the surface of the photosensitive member facing a seam, which is formed by mutually adjacent edges of the base material of the second charging member at a contact part between the second charging member and the photosensitive member.