The image forming apparatus includes a lower body, an upper body openable from and closable to the lower body, the upper body including a device for forming an image and a support member for supporting the upper body when the upper body is opened, wherein a fastening portion for fastening the upper body and the support member is exposed when the device is detached from the upper body. Thus an influence of the weight of the upper body can be alleviated and the support member supporting the upper body can thus be safely replaced.