An image forming apparatus including a gloss applying mode for applying gloss to an image formed with toner on a sheet and a non-gloss-applying mode for not applying gloss to the image on the sheet, the image forming apparatus comprising: a fixing device including a fixing member and a pressurizing member that is pressed into contact with the fixing member to form a fixing nip portion in which the toner is fixed to the sheet; and a gloss applying device including a first rotating body including a heating unit and a second rotating body that is pressed into contact with the first rotating body to form a gloss applying nip portion in which gloss is applied to the toner, wherein the fixing device and the gloss applying device are provided on a path line along which the sheet is conveyed, wherein when the sheet is conveyed in the non-gloss-applying mode, nip pressure of the gloss applying nip portion in the gloss applying device is lower than that in the gloss applying mode, wherein the image forming apparatus further comprises: a conveying roller pair disposed on a downstream side of the gloss applying device along the path line, characterized in that the image forming apparatus is configured such that when the sheet having a length that is greater than or equal to a standard length in a sheet conveying direction is conveyed in the non-gloss-applying mode, the first rotating body and the second rotating body in the gloss applying device are separated from each other, and the sheet is conveyed by the conveying roller pair. a fixing device including a fixing member and a pressurizing member that is pressed into contact with the fixing member to form a fixing nip portion in which the toner is fixed to the sheet; and a gloss applying device including a first rotating body including a heating unit and a second rotating body that is pressed into contact with the first rotating body to form a gloss applying nip portion in which gloss is applied to the toner, wherein the fixing device and the gloss applying device are provided on a path line along which the sheet is conveyed, wherein when the sheet is conveyed in the non-gloss-applying mode, nip pressure of the gloss applying nip portion in the gloss applying device is lower than that in the gloss applying mode, wherein the image forming apparatus further comprises: a conveying roller pair disposed on a downstream side of the gloss applying device along the path line, characterized in that the image forming apparatus is configured such that when the sheet having a length that is greater than or equal to a standard length in a sheet conveying direction is conveyed in the non-gloss-applying mode, the first rotating body and the second rotating body in the gloss applying device are separated from each other, and the sheet is conveyed by the conveying roller pair. a conveying roller pair disposed on a downstream side of the gloss applying device along the path line, characterized in that the image forming apparatus is configured such that when the sheet having a length that is greater than or equal to a standard length in a sheet conveying direction is conveyed in the non-gloss-applying mode, the first rotating body and the second rotating body in the gloss applying device are separated from each other, and the sheet is conveyed by the conveying roller pair.