An image forming apparatus may includes an image carrying body, a intermediate transferring unit which includes an intermediate transferring belt to which a visible image on the image carrying body is transferred, a driving roller to drive the intermediate transferring belt, and a first roller support unit to support a rotation shaft of the driving roller. The image-forming apparatus also includes a medium transferring unit to transfer a visible image on the intermediate transferring belt to a printing medium and includes a transferring roller to move between a pressing position pressing the driving roller to interpose the intermediate transferring belt therebetween and a separated position separated from the pressing position, and a second roller support unit to support a rotation shaft of the transferring roller. The pressing position of the transferring roller can be regulated by a contact of the first roller support unit and the second roller support unit.