To reliably sort paper so that the thickness and weight of a bundle of paper are equal to or less than those determined according to packaging styles.

This paper handling device includes at least a discharge part for discharging paper, a storage part, and a control unit. The storage part stores a first table for associating the basic weight of the paper with the thickness of the paper or a first table for associating the basic weight of the paper and the size of the paper with the weight of the paper. The control unit acquires the thickness of a sheet of paper the basic weight of which is specified or the weight of a sheet of paper the basic weight and the size of which are specified, referring to the first table, calculates the thickness and/or the weight of the bundle of paper discharged from the discharge part based on the thickness and/or the weight of a sheet of paper, and sorts the paper so that the thickness and/or the weight of each bundle of paper is equal to or less than that determined according to packaging styles and the paper is discharged from the discharge part.