A paper feeder cassette includes a bottom part, a pair of support plates that moves relative to the bottom part and supports the both lateral sides of the sheets of paper in a paper width direction perpendicular to a paper transporting direction, and a paper disposition plate that is disposed above the bottom part and disposes the sheet of paper thereon and includes an edge portion provided along a direction approximately perpendicular to the paper transporting direction on the downstream side of the pair of the support plates in the paper transporting direction and a contact avoidance portion for preventing the sheets of paper from making contact with the edge portion when disposition of the sheets of paper are performed by sliding the sheets of paper along the paper transporting direction.