An image forming apparatus includes an image forming unit, an apparatus body, a door, a sheet conveyance unit, and a positioning device. The image forming unit forms an image on a sheet. The image forming unit is disposed in the apparatus body. The door is provided in the apparatus body so as to be openable and closable. The sheet conveyance unit conveys the sheet to the image forming unit. The sheet conveyance unit is provided in the door. The positioning device positions the door in relation to the apparatus body in the vertical direction and the horizontal direction. The positioning device performs positioning of the door in the vicinity of the image forming unit.