An image forming apparatus includes an image forming unit to form an image on a print medium, a fixing unit to fix the image formed by the image forming unit on the print medium, and a guide member installed in a moving path where air moves along between the image forming unit and the fixing unit so that air inhaled through an inhaling unit formed at one side of a main frame can be exhausted to an exhaust unit formed at the other side of the main frames, and to guide a moving direction of the air so that the air inhaled through the inhaling unit can move to the image forming unit along the moving path.