Patent ID: 8331827

Claim:
An image forming apparatus, comprising: a transfer unit having a transfer nip, which is provided in an upstream side of a conveyance direction of a paper; a fixing unit having a fixing nip of a fixing belt, which is provided in a downstream side of the conveyance direction; a fixing belt position changing mechanism unit to change a widthwise position of the fixing belt; and a control unit to control the fixing belt position changing mechanism unit according to the widthwise position of the fixing belt, wherein the control unit can change widthwise position of the fixing belt when the paper is nipped by both of the transfer nip of the transfer unit and the fixing nip of the fixing unit at a same time and when the paper is not nipped by both of the transfer nip and the fixing nip at the same time; and when the paper is nipped by both of the transfer nip and the fixing nip at the same time, the control unit makes an amount of change in the widthwise position of the fixing belt smaller than that of when the paper is not nipped by both of the transfer nip and the fixing nip at the same time.