To prepare several kinds of classifying port changeover systems fitted to respective stages of classifying operation in the classifying operation (pass) of a plurality of paper sheets so as to be capable of changing over them and to perform the changeover of the classifying port optimum to the stage of the classifying operation.

A multi-pocket designation mechanism for alloting a plurality of ports is provided to one delivery place and, by the changeover due to a mode changeover means, a system control part 20 can change over a circulation system changing over a first port A to a second port B when the first port is filled and returning the first port A from a final port C when the port C is filled to repeat the same operation, and a single direction system repeating the operation at the final port C without returning to the first port A. By this constitution, the systems can be changed over corresponding to a classifying stage and classifying work can be efficiently performed by the optimum system.