An image forming apparatus includes a discharge guide provided downstream of a fixing device in a sheet transport direction, and configured to guide a sheet on which a toner image has been fixed, to a sheet discharge port formed in a main body of the image forming apparatus, the discharge guide including an air vent for cooling the sheet, and a cooling fan that blows air to the sheet passing the discharge guide, through the air vent. A fixing device housing includes an air inlet that allows an airflow generated by the cooling fan toward the sheet and reflected thereby, to be introduced into inside the fixing device housing.