Document feeding device and image forming apparatus

A document feeding device that includes:

• a first transport path on which a document is transported to a reading position;
• a second transport path on which the document that has been transported to the reading position is transported to a discharge tray;
• a third transport path that is disposed between the first transport path and the second transport path and on which the document that has passed through the reading position is returned to the first transport path;
• and
• a discharge roller pair that is disposed on the second transport path and that includes a first drive roller and a first idler roller, the discharge roller pair transporting the document that has passed through the reading position to the discharge tray by rotating the first drive roller forward, and transporting the document that has passed through the reading position via the third transport path to the first transport path by rotating the first drive roller in reverse;
• wherein the document feeding device comprises a transport roller pair that is disposed on the second transport path and that includes a second drive roller and a second idler roller,
• either one of the second drive roller and the second idler roller moves between a contact position where said roller is in contact with the other roller and a separation position where said roller is separated from the other roller, and
• the transport roller pair is disposed on the other side of the discharge roller pair from the discharge tray, and transports the document that has passed through the reading position to the discharge roller pair by positioning said roller at the contact position in a case where the first drive roller rotates forward.