A paper-sheet handling device comprising: a control unit configured to control a plurality of paper-sheet handling units including paper-sheet handling units, paper sheet handling processes of which are different; and a plurality of first connection control units configured to control the respective paper-sheet handling units based on an instruction of the control unit, wherein the first connection control units are connected to the control unit by a first daisy chain, the first connection control unit positioned at a top in the first daisy chain is configured to receive a first numeral from the control unit, to recognize the first numeral as an identifier to identify a paper-sheet handling unit controlled by itself, to add a second numeral to the first numeral to generate a numeral as a new identifier, and to transmit the new identifier to the first connection control unit of a next stage in the daisy chain, and the first connection control units except the first connection control unit positioned at the top in the first daisy chain are configured to receive the numeral transmitted by the first connection control unit of a previous stage, to recognize the transmitted numeral as an identifier to identify the paper-sheet handling unit controlled by themselves, to add the second numeral to the transmitted numeral to generate another new numeral as another new identifier, and to transmit, when the first connection control unit that follows is present, the another new identifier to the following first connection control unit, characterized in that the respective first connection control units are connected to a plurality of second connection control units configured to control the respective other paper-sheet handling units based on an instruction of the control unit by a second daisy chain separately from the first daisy chain, wherein the respective first connection control units are configured to add a third numeral to the identifier identifying the paper-sheet handling unit controlled by themselves, and to transmit the resulting identifier to the second connection control unit positioned at a top in the second daisy chain, and the respective second connection control units are configured to recognize the received identifier as an identifier to identify the paper-sheet handling unit controlled by themselves, to add the third numeral to the received identifier, and to transmit the resulting identifier, when the second connection control unit that follows is present in the second daisy chain, to the following second connection control unit, wherein the paper-sheet handling units are arranged two-dimensionally in rows and columns and upper bytes of the respective identifiers indicate the number of the column and lower bytes of the respective identifier indicate the number of the row. a control unit configured to control a plurality of paper-sheet handling units including paper-sheet handling units, paper sheet handling processes of which are different; and a plurality of first connection control units configured to control the respective paper-sheet handling units based on an instruction of the control unit, wherein the first connection control units are connected to the control unit by a first daisy chain, the first connection control unit positioned at a top in the first daisy chain is configured to receive a first numeral from the control unit, to recognize the first numeral as an identifier to identify a paper-sheet handling unit controlled by itself, to add a second numeral to the first numeral to generate a numeral as a new identifier, and to transmit the new identifier to the first connection control unit of a next stage in the daisy chain, and the first connection control units except the first connection control unit positioned at the top in the first daisy chain are configured to receive the numeral transmitted by the first connection control unit of a previous stage, to recognize the transmitted numeral as an identifier to identify the paper-sheet handling unit controlled by themselves, to add the second numeral to the transmitted numeral to generate another new numeral as another new identifier, and to transmit, when the first connection control unit that follows is present, the another new identifier to the following first connection control unit, the respective first connection control units are connected to a plurality of second connection control units configured to control the respective other paper-sheet handling units based on an instruction of the control unit by a second daisy chain separately from the first daisy chain, wherein the respective first connection control units are configured to add a third numeral to the identifier identifying the paper-sheet handling unit controlled by themselves, and to transmit the resulting identifier to the second connection control unit positioned at a top in the second daisy chain, and the respective second connection control units are configured to recognize the received identifier as an identifier to identify the paper-sheet handling unit controlled by themselves, to add the third numeral to the received identifier, and to transmit the resulting identifier, when the second connection control unit that follows is present in the second daisy chain, to the following second connection control unit, wherein the paper-sheet handling units are arranged two-dimensionally in rows and columns and upper bytes of the respective identifiers indicate the number of the column and lower bytes of the respective identifier indicate the number of the row.