The paper object processing device comprises a take-out roller which feeds tickets where one surface side is a heat-sensitive surface and the other surface side is a non heat-sensitive surface, a conveying path which conveys the fed ticket, a bar-code reader which reads the bar-code recorded on the heat-sensitive surface of the ticket conveyed, stacking sections which stack the tickets whose bar-codes have been read, a sealing device which seals a band on the stacked tickets which have been stacked, and a thermal head which heat-prints control information on the heat-sensitive surface of the stacked tickets which have been sealed.