Image forming apparatus

An image forming apparatus comprising:

• an apparatus main body configured to form an image on a sheet;
• and
• an image reading apparatus provided on the apparatus main body and configured to read an image on a document,
• wherein the apparatus main body includes
• a sheet supporting portion configured to support a sheet,
• a sheet feeding unit configured to feed the sheet supported by the sheet supporting portion,
• an image forming unit configured to form the image on the sheet fed by the sheet feeding unit, and
• a sheet discharge portion configured to discharge the sheet on which the image is formed by the image forming unit in a sheet discharge direction from a rear side of the image forming apparatus toward a front side of the image forming apparatus,
• wherein the image reading apparatus includes
• a document supporting portion configured to support a document,
• a document feeding portion configured to feed the document supported by the document supporting portion in a document feeding direction from the front side toward the rear side,
• an image reading unit configured to read an image on the document fed by the document feeding portion,
• a document discharge portion configured to discharge the document whose image has been read by the image reading unit in a document discharge direction from the rear side toward the front side, and
• a document stacking portion on which the document discharged by the document discharge portion is stacked, and
• wherein the document supporting portion includes a first supporting portion configured to support a document and a second supporting portion configured to be slidable toward the front side with respect to the first supporting portion and support the document together with the first supporting portion.