An image forming apparatus is provided that can achieve a reduction in size while ensuring the necessary cooling performance. The image forming apparatus includes in an apparatus main body thereof: an image carrier; a developing device disposed to oppose the image carrier; a cooling fan; and a cooling duct flowing cool air from the cooling fan to at least the image carrier and the developing device, in which the cooling duct includes an image-carrier cooling duct that flows cool air to the image carrier; and a developing-device cooling duct that flows cool air to the developing device, and the image-carrier cooling duct and the developing-device cooling duct are disposed abreast front to back inside of the apparatus main body.