Image forming apparatus

An image forming apparatus comprising:

• a transport path that transports an image forming medium from a tray in a top-bottom direction;
• a first image framing unit including a first intermediate transfer belt, which is disposed so as to face the transport path, to which toner images formed in a plurality of first toner-image forming units are transferred, and from which the toner images are transferred to the medium transported along the transport path;
• a second image forming unit including a second intermediate transfer belt, which is disposed upstream of the first image forming unit in a medium transport direction so as to face the transport path, to which toner images formed in a plurality of second toner-image forming units are transferred, and from which the toner images are transferred to the medium transported along the transport path;
• a single transport belt, wherein the medium is transported from the tray to the first image forming unit and the second image forming unit along the transport path through the single transport belt;
• and
• a ventilation path formed between the first image forming unit and the second image forming unit, which are spaced apart.