Image forming apparatus

An image forming apparatus, comprising:

• a housing;
• a sheet conveyance path along which a sheet is conveyed from a lower side toward an upper side in the housing;
• a toner containing unit which is arranged to face the sheet conveyance path at a first position of the sheet conveyance path and contains a toner inside;
• a fixing unit which faces the sheet conveyance path at a second position of the sheet conveyance path downstream of the first position in a conveying direction and applies a fixing process to the sheet;
• a fixing housing which houses the fixing unit and includes a wall portion facing the toner containing unit;
• a heat insulation member, one end of which faces the sheet conveyance path, the other end of which extends away from the sheet conveyance path and which shields between the wall portion and the toner containing unit;
• a first hot air exhaust passage which is arranged between the heat insulation member and the toner containing unit and into which an air flow in the sheet conveyance path enters from the one end of the heat insulation member;
• a second hot air exhaust passage which communicates with the first hot air exhaust passage at the other end of the heat insulation member and allows the air flow having entered the first hot air exhaust passage to be exhausted upward;
• a third hot air exhaust passage which is arranged between the wall portion and the heat insulation member and includes an opening facing the sheet conveyance path at the one end of the heat insulation member and a communication port communicating with the second hot air exhaust passage at the other end of the heat insulation member
• a sheet discharge opening arranged at a side of the sheet conveyance path downstream of the second position and through which the sheet is to be discharged;
• a sheet discharging portion located below the sheet discharge opening and on which the sheet being discharged is to be placed;
• and
• a standing wall standing between the fixing housing and the sheet discharging portion;
• wherein the second hot air exhaust passage is arranged between the fixing housing and the standing wall and the standing wall includes an exhaust port for allowing the air flow to be exhausted from the second hot air exhaust passage.