An image forming apparatus includes: an image forming body; an intermediate transfer body for carrying a toner image transferred from the image forming body and conveying a transfer material thereon; a first transfer device for transferring the toner image on the image forming body onto the intermediate transfer body or a front side of the transfer material; a second transfer device for transferring the toner image on the intermediate transfer body onto a back side of the transfer material; and a fixing device for fixing the toner image transferred on the transfer material. The second transfer device includes a corona discharger having a discharging electrode and a shielding member for shielding an electric field when the discharging electrode discharges, and the shielding member has a circulation hole through which air flows along an outer circumferential surface of the intermediate transfer body in a conveyance direction from upstream to downstream of the transfer material.