Medium feeding apparatus and image reading apparatus

A medium feeding apparatus comprising:

• a medium supporting portion supporting a medium;
• a feeding roller that comes into contact with an upper surface of the medium supported by the medium supporting portion;
• a separation portion disposed to face the feeding roller and configured to advance and retreat with respect to the feeding roller;
• a path forming member
• that is a member positioned upstream in a medium feeding direction with respect to a contact position between the feeding roller and the separation portion,
• that is configured to advance and retreat with respect to the feeding roller in accordance with a thickness of the medium, and
• that is configured to narrow a medium feeding path directed toward the contact position by advancing with respect to the feeding roller;
• the separation portion is held by a holding member that is configured to advance and retreat with respect to the feeding roller;
• a first pressing portion that presses the path forming member toward the feeding roller;
• and
• a second pressing portion that is separate from the first pressing portion and that presses the holding member toward the feeding roller, wherein
• the path forming member is configured to displace the separation portion in a direction away from the feeding roller when the path forming member is pushed down in a direction retreating from the feeding roller by a medium having a thickness exceeding a predetermined thickness.