The invention provides a papers treatment device, which can shorten the time required by sifting processing, for processing a plurality of papers having inherent identification information, which is characterized in that it has a papers containing part, for performing containing and withdrawing of papers, to withdraw papers in a sequence opposite to the containing sequence; an identification part, for obtaining identification information from the papers contained in the papers containing part and papers withdrawn from the paper containing part. Furthermore, the papers treatment device also includes: an information management part, for managing the value information and identification information in the papers containing part that can determine the benchmark papers; and a sifting processing part. The sifting processing includes: withdrawing papers from the papers containing part in prescribed timing and counting, performing benchmark papers detection to the identification information obtained from the withdrawn papers, and determining the papers value in the papers containing part based on the counting value of the papers based on the detected benchmark papers and determined value information.