Abstract: An apparatus for discriminating authenticity and denomination of paper money bills and stacking the same includes at the transfer passage through which the paper money bills are transferred in an unfolded condition guide pieces which form a pushing-in part which is adjacent the reverse face of the paper money. Sending-out elements are arranged ahead of the guide pieces. The sending-out elements are movably supported and include spaced apart moving pieces, such that when the sending-out elements turn, the moving pieces push the paper money bills into the stacker box and spread them out moving from a front portion of the transfer passage to a rear side of the guide pieces and pushing the pushing-in part while the distance between the moving pieces expands. This structure enables the apparatus to press the paper money into the stacker box and at the same time spread out the paper money.