Image forming apparatus having tray for receiving recording medium

An image forming apparatus comprising:

• a main casing;
• a plurality of process cartridges each having a photosensitive drum;
• a process frame configured to accommodate therein the plurality of process cartridges;
• an intermediate transfer belt configured to receive a developer image transferred from each photosensitive drum;
• a secondary transfer roller configured to transfer the developer image from the intermediate transfer belt to a sheet;
• a sheet feed tray configured to accommodate a first sheet therein;
• a sheet feed roller configured to feed the first sheet accommodated in the sheet feed tray toward the secondary transfer roller in a first sheet conveying direction;
• and
• a manual feed part configured to feed a second sheet that is inserted into the main casing, the manual feed part comprising:
• a first part disposed above the sheet feed tray and below the intermediate transfer belt, the first part including a roller, the roller being configured to feed the second sheet toward a position, which is defined between the sheet feed roller and the secondary transfer roller in the first sheet conveying direction, without the second sheet being conveyed by the sheet feed roller;
• and
• a second part disposed above the sheet feed tray and below the intermediate transfer belt, the second part being disposed upstream of the first part in a second sheet conveying direction of the second sheet fed by the roller, the second part being configured to receive the second sheet, and the second part being movable relative to the first part,
• wherein the main casing is formed with an opening,
• wherein the main casing includes a front cover configured to open and close the opening, the process frame being movable through the opening when the front cover is open, the process frame being movable through the opening between an inside position and an outside position, the process frame being inside the main casing when the process frame is at the inside position, and at least part of the process frame is outside the main casing when the process frame is at the outside position,
• wherein the process frame accommodates the plurality of process cartridges such that the plurality of process cartridges are arranged in a front-rear direction, the plurality of process cartridges including a first process cartridge that is closest to the front cover in the front-rear direction among the plurality of process cartridges when the process frame is at the inside position, and
• wherein, as viewed in an up-down direction, the first process cartridge is overlapped with a boundary between the first part and the second part in the second sheet conveying direction when the process frame is at the inside position.