Patent ID: 8660451

Claim:
A cleaning device for cleaning a belt member which rotates by coming in contact with a part of an image carrying member on which a toner image to be transferred to a paper sheet and a toner image not to be transferred to a paper sheet are formed, comprising: a cleaning blade to remove toner adhering on the surface of the belt member; a removing member which is installed at an upstream side of the cleaning blade in a rotation direction of the belt member and comes in contact with the surface of the belt member in a counter direction to the rotation direction of the belt member so as to remove foreign matter adhering on the surface of the belt member; and a contact pressure changing section to change a contact pressure between the removing member and the belt member, wherein, when the contact pressure between the removing member and a region of the belt member corresponding in position to a toner image to be not transferred to a paper sheet is made P 1 , and the contact pressure between the removing member and a region of the belt member corresponding in position to a toner image to be transferred to a paper sheet is made P 2 , the contact pressure changing section changes the contact pressure to satisfy the conditional formula: (P 1 <P 2 ), and wherein the belt member and the removing member are made of a semi conductive material, the cleaning device further comprises a roller which is positioned opposite to the removing member across the belt member and is made of a conductive material, and the contact pressure changing section changes an electrostatic adsorptive power caused by an electric field between the removing member and the roller.