Abstract: An image forming apparatus. The image forming apparatus includes a body of the image forming apparatus within which a developing part to develop an image on a print medium fed to the image forming apparatus is housed, a fixing unit installed within the body of the image forming apparatus to fix the image transferred to the print medium, a feeding unit to feed the print medium in such a way that a single side/both sides of a print medium is/are formed with an image/images while passing through the body of the image forming apparatus, a control unit to supply a voltage to the body of the image forming apparatus to control the body, the fixing unit, and the feeding unit of the image forming apparatus, and a cooling unit. The cooling unit is installed within the body of the image forming apparatus to cool the interior of the body of the image forming apparatus.