Patent ID: 6965740

Claim:
An image forming apparatus, comprising: a transfer unit, which transfers a toner image on a first face of a sheet; a fixing unit, which fixes the toner image onto the first face of the sheet; a sheet detecting unit, which detects the sheet in a sheet transporting path between the transfer unit and the fixing unit, and slidingly contacts with the sheet, wherein the sheet detecting unit including: a rotator, which rotates by a slide contact on a second face which is backside of the first face of the sheet; and a supporting member, which supports the rotator rotatably; wherein the rotator is comprised of a material which is charged by the slide contact on the sheet with a first polarity, the first polarity being opposed to a second polarity with which a toner of the toner image is charged; and wherein the supporting member is comprised of a material charged by the slide contact on the sheet with the second polarity.