Image forming apparatus

An image forming apparatus, comprising:

• a main body comprising a first sheet outlet tray and an image forming unit;
• and
• a feed path configured to guide a sheet from the image forming unit toward the sheet outlet tray, the feed path comprising:
• a first exit path configured to guide a sheet toward the first sheet outlet tray;
• and
• a first duplex path configured to diverge from the feed path and guide a sheet to return to the image forming unit,
• wherein the main body is configured to be attachable with a sheet-exit unit, the sheet-exit unit comprising a second sheet outlet tray, a second exit path, and a second duplex path, the second exit path being configured to guide a sheet to the second sheet outlet tray;
• wherein the second exit path is connected with the first exit path and the second duplex path is connected with the first duplex path when the sheet-exit unit is attached to the main body;
• wherein the first sheet outlet tray is disposed in an upper position with respect to the image forming unit;
• wherein the first exit path is formed to extend to be away from the image forming unit and turn in a U-shape toward the first sheet outlet tray;
• and
• wherein the second exit path is connected with the feed path at a position downstream from a bottom part of the U-shape in the feed path with regard to a direction to feed the sheet when the sheet-exit unit is attached to the main body.