Paper-sheet bundling device

The purpose of the present invention is to provide a paper-sheet bundling device wherein malfunctions which can occur as a result of the formation of creases in tape are avoided. This paper-sheet bundling device is provided with: a reel unit in which a tape roll is set, and which rotates the tape roll in a tape feeding direction and a tape winding direction; a tape conveyance unit which is provided with a conveyance path disposed between the reel unit and a tape bundling unit, and which, when the tape bundling unit is performing bundling, conveys the tape along the conveyance path to supply the tape to the tape bundling unit, and, when the tape bundling unit is not performing bundling, holds the tape in a state of being continuously disposed along the conveyance path; and a specific-operation execution means which, when the tape bundling unit is not performing bundling, executes, at a prescribed timing, a specific operation in which the tension of the tape disposed continuously along the conveyance path is relaxed.