Image forming apparatus

An image forming apparatus, comprising:

• an image forming portion that superposes images having a plurality of colors on an intermediate transfer member by a plurality of rotations of the intermediate transfer member to form a color image on the intermediate transfer member;
• a transfer portion that transfers the image formed on the intermediate transfer member to a sheet;
• a fixing portion that fixes the transferred image onto the sheet;
• and
• a switchback portion that switches back the sheet that has passed through the fixing portion so as to return the sheet to the transfer portion through a return path for forming the image on a second face of the sheet, after the image has been formed on a first face of the sheet,
• wherein the sheet is returned through the return path at a return speed equal to or lower than a delivery speed of the sheet at the transfer in the transfer portion when the image formed in the image forming portion for the second face of the sheet is the color image.