Medium feeding device and image reading apparatus

A medium feeding device comprising:

• a medium mounting section that forms a medium mounting surface on which a medium is mounted;
• a feeding unit that feeds a lowest medium among media mounted on the medium mounting section in a feeding direction by coming into contact with the lowest medium;
• a separation unit that separates the medium with the feeding unit;
• an operation detection unit that is disposed at a position facing a surface of the medium in the medium mounting section and detects at least a movement of the medium in the feeding direction;
• a plurality of interval forming units that are provided upstream of the operation detection unit and that are offset with the operation detection unit in a width direction of the medium feeding device, the feeding unit and the separation unit in the feeding direction, the plurality of interval forming units each having a bottom surface that contacts the medium mounting surface and a surface that projects upwardly from the medium mounting surface that is upstream of the feeding unit and the separation unit, and forms an interval in the feeding direction between a trailing end of a first medium which is the lowest medium fed by the feeding unit among media mounted on the medium mounting section and a trailing end of a second medium which is bound with the first medium and stacked on the first medium;
• a pair of edge guides that are separate from the plurality of interval forming units;
• and
• a control unit that stops feeding of the medium based on a detection interval by a detection value of the operation detection unit.