To provide a batch-processible paper sheet processor storing or sealing exclusion paper in each batch in an accumulation part cassette.

Cassette assignment is performed from an operation display part 552. An accumulation device for accumulating the exclusion paper is set by the cassette assignment (S10). Next, the batch set to a processing box is set to a supply part 10 (S11). A dummy card, the exclusion paper, and a batch card are accumulated in an exclusion paper accumulation device (e.g. the cassette 57D of the accumulation device 57). The exclusion paper is taken out from the cassette in each the batch, and a bach card number, a paper kind, and the number of the papers or the like are input by an operator. When the plurality of batches are present, the above processing is repeated in each the batch.