Image forming system

An image forming system comprising:

• an image forming apparatus;
• and
• a feeding device,
• the image forming apparatus including:
• an image forming unit configured to form an image on a sheet;
• a housing that stores the image forming unit;
• an opening/closing door that is provided so as to be capable of turning around a rotary shaft horizontal to the housing, and that is openable and closable between a first closed position at which the opening/closing door is closed with respect to the housing and a first open position at which the opening/closing door is opened with respect to the housing;
• and
• a support unit that is provided so as to be capable of turning around a rotary shaft horizontal to the opening/closing door, that is openable and closable between a second closed position at which the support unit is closed with respect to the opening/closing door and a second open position at which the support unit is opened with respect to the opening/closing door, and that is configured to support a sheet when the support unit is at the second open position, and
• the feeding device being movable in a direction horizontal to the image forming apparatus, configured to move to a coupled position at which the feeding device is coupled to the image forming apparatus, move to a decoupled position at which the feeding device is decoupled from the image forming apparatus, and feed the sheet to the image forming apparatus when the feeding device is at the coupled position,
• wherein when the feeding device is at the decoupled position and the opening/closing door is at the first open position, the feeding device overlaps the support unit as viewed from a first direction from the image forming apparatus to the feeding device at the coupled position.