To provide a paper sheet processing device preventing take-in/out of a paper sheet by transmitting ticket kind information together with the conveyance destination information of the paper sheet when the size of the device is increased and conveyance is monitored by a plurality of CPUs.

In this embodiment, a detection device, an M1 control CPU 10 (CPU 10) and an M2 control CPU 20 (CPU 20) are connected by a LAN 50, a detection result of the paper sheet P by the detection device of an M1 is transmitted to the CPU 10, and the CPU 10 transmits the ticket kind information based on the detection result, compiling destination information based on the ticket kind information and ticket length information of a sensor PC 14 to the CUP 20 of an M2. The CPU 20 counts a number of sheets actually conveyed to a compiling and sealing device based on compiling portion information transmitted from the first conveying means, and transmits it to the CPU 10. The CPU 10 collates a number of received sheets with a number of sent sheets.