PURPOSE: To prevent paper from buckling by providing a buckling correcting member driven being associated with a retaining member and for correcting buckling of the paper accommodated.

CONSTITUTION: Paper is fed into an accommodating part by a conveying means, and a retaining member 120 is driven in a direction of a paper loading surface 100 in every accommodation of one sheet, pressing the accommodated paper in its accommodating direction rear end part. Here even a buckling correcting member (arm) 125 is driven to a paper side, being associated with pressing action of the retaining member 120, and the paper is prevented from buckling by urging the buckling paper to a side of the paper loading surface 100.