Image forming apparatus and fixing device

An image forming apparatus, comprising:

• an image forming unit configured to form a toner image on a sheet;
• a first fixing device fixing the toner image formed on the sheet by the image forming unit;
• a second fixing device fixing the toner image on the sheet carrying the toner image fixed by the first fixing device;
• a fixing conveyance path guiding the sheet carrying the toner image fixed by the second fixing device;
• a detour conveyance path diverging from the fixing conveyance path on an upstream side of the second fixing device, and joining the fixing conveyance path at a joining point on a downstream side of the second fixing device so that the sheet is guided detouring the second fixing device;
• a joined conveyance path guiding the sheet on a downstream side of the joining point;
• a first curl applying unit disposed on the joined conveyance path and applying a curl to the sheet;
• and
• a second curl applying unit disposed on the detour conveyance path and applying a curl to the sheet.