Patent ID: 7437096

Claim:
An image forming device comprising: a casing having a top wall and side walls, the side walls including a front side wall and a rear side wall opposite to each other, the top wall being positioned at a top of the casing when the casing is disposed in an orientation in which the casing is intended to be placed; a process cartridge including an image bearing member that bears a toner image thereon; a scanning unit that exposes the image bearing member to scanned light; and a fixing unit including a fixing roller that extends in an axial direction and that fixes the toner image transferred from the image bearing member onto a recording medium, the front side wall and the rear side wall each extending in a direction substantially parallel to the axial direction, the fixing unit being disposed at a position closer to the rear side wall than to the front side wall, wherein the top wall is formed with a depressed portion depressed toward inside the casing, the depressed portion serving as a sheet discharge tray for receiving the recording medium that has passed through the fixing unit, the sheet discharge tray including a tray member detachably disposed at the top wall; wherein the rear side wall is formed with an opening through which the fixing unit is removed; wherein, when the tray member is disposed at the top wall, the tray member is positioned above and adjacent to the fixing unit and overlaps the fixing unit when viewed through the opening to prevent the fixing unit from being removed from the casing; and wherein the fixing unit is removable through the opening when the tray member is detached from the top wall.