A paper materials sorting apparatus that includes note denomination discriminating mechanism for discriminating the paper materials based on note denominations of the paper materials, cassette assignment mechanism for assigning each of a plurality of wrapping devices and/or storage devices a note denomination, and a sorting mechanism for sorting the paper materials in accordance with their note denomination and for directing the sorted paper materials to the corresponding assigned wrapping devices and/or storage devices. The sorting mechanism further contains counting mechanism for counting throughput of the sorted paper materials into each of the assigned wrapping devices and/or storage devices, comparison mechanism for comparing the throughput of each of the assigned wrapping devices and/or storage devices, and an operation display for displaying a recommended operation to reassign the note denominations of the wrapping devices and/or storage devices in order to balance the sorting load among the wrapping devices and/or storage devices.