Patent ID: 7664430

Claim:
An image forming apparatus comprising: an image carrier that rotates in a predetermined direction so as to carry a toner image; a charging member that charges the image carrier by a discharge operation; a toner holding member that is disposed to be in contact with the image carrier so as to hold toner in a portion being in contact with the image carrier and that removes a discharge product generated on the image carrier; and a holding amount adjusting unit that adjusts a toner holding amount of the toner holding member, the holding amount adjusting unit including: an estimation unit that estimates a current toner holding amount of the toner holding member; and a correction unit that corrects, the toner holding amount of the toner holding member on a basis of an estimation result obtained from the estimation unit, wherein the estimation unit estimates and updates the current toner holding amount of the toner holding member on a basis of input image information.