A paper sheets handling apparatus comprising: an input and output port for allowing an input and output of paper sheets by a user; a discriminating portion for discriminating the paper sheets; a carrier path (50, 90) carrying the paper sheets; a first recycle box provided with one storage portion (700a, 700b) for paper sheets and serving as a single paper sheets storage; a second recycle box provided with a plurality of storage portions (700a, 700b) for paper sheets and serving as a multiple paper sheets storage; a reject box for storing paper sheets discriminated not to reach a predetermined reference by the discriminating portion; and a plurality of storage installing portions, wherein each of the first and second recycle boxes comprises one output and input portion for outputting and inputting the paper sheets with respect to the carrier path, and the reject box comprises an input portion for inputting the paper sheets with respect to the carrier path, the output and input portions of each of the first and second recycle boxes and the input portion of the reject box comprising a delivery roller (706; 606, 816); wherein the first recycle box further comprises one accumulating and feeding motion portion carrying out an accumulating motion of the paper sheets to the storage portion and a feeding motion of the paper sheets from the storage portion; wherein the second recycle box further comprises: for each of its storage portions, one accumulating and feeding motion portion carrying out an accumulating motion of the paper sheets to the storage portion and a feeding motion of the paper sheets from the storage portion; and an internal carrier path for carrying the paper sheets in a two-way direction between the one paper sheets output and input portion and the one or more accumulating and feeding motion portions; and wherein the first and second recycle boxes and the reject box have in common an outer shape dimension, a position of the paper sheets output and input port, a nesting shape of a guide in the paper sheets output and input portion, a carrier driving portion and a pinching position of the delivery roller, such that the first and second recycle boxes and the reject box are installable into the storage installing portions in a freely changeable combination. an input and output port for allowing an input and output of paper sheets by a user; a discriminating portion for discriminating the paper sheets; a carrier path (50, 90) carrying the paper sheets; a first recycle box provided with one storage portion (700a, 700b) for paper sheets and serving as a single paper sheets storage; a second recycle box provided with a plurality of storage portions (700a, 700b) for paper sheets and serving as a multiple paper sheets storage; a reject box for storing paper sheets discriminated not to reach a predetermined reference by the discriminating portion; and a plurality of storage installing portions, wherein each of the first and second recycle boxes comprises one output and input portion for outputting and inputting the paper sheets with respect to the carrier path, and the reject box comprises an input portion for inputting the paper sheets with respect to the carrier path, the output and input portions of each of the first and second recycle boxes and the input portion of the reject box comprising a delivery roller (706; 606, 816); wherein the first recycle box further comprises one accumulating and feeding motion portion carrying out an accumulating motion of the paper sheets to the storage portion and a feeding motion of the paper sheets from the storage portion; wherein the second recycle box further comprises: for each of its storage portions, one accumulating and feeding motion portion carrying out an accumulating motion of the paper sheets to the storage portion and a feeding motion of the paper sheets from the storage portion; and an internal carrier path for carrying the paper sheets in a two-way direction between the one paper sheets output and input portion and the one or more accumulating and feeding motion portions; and for each of its storage portions, one accumulating and feeding motion portion carrying out an accumulating motion of the paper sheets to the storage portion and a feeding motion of the paper sheets from the storage portion; and an internal carrier path for carrying the paper sheets in a two-way direction between the one paper sheets output and input portion and the one or more accumulating and feeding motion portions; and wherein the first and second recycle boxes and the reject box have in common an outer shape dimension, a position of the paper sheets output and input port, a nesting shape of a guide in the paper sheets output and input portion, a carrier driving portion and a pinching position of the delivery roller, such that the first and second recycle boxes and the reject box are installable into the storage installing portions in a freely changeable combination.