Paper currency handling device

In a conventional accumulation mechanism, the amount of rotation and the rotational velocity of the paddlewheel are the same even when the width of the accumulation space differs. When the amount of rotation is small and the rotational velocity is low, and the accumulation space is wider than the dimensions of the paper currency, the paper currency falls over. Conversely, when the amount of rotation is large and the rotational velocity is high, the posture of the stored paper currency deteriorates. Accordingly, for a paper currency handling device equipped with an accumulation mechanism for compiling and storing paper currency, the accumulation mechanism has: an accumulation space for storing paper currency; a paddlewheel that makes contact with one end of the paper currency and transports the paper currency toward the accumulation space; a driving means that rotates the paddlewheel; an operating plate that changes the width of the accumulation space; and a position detection means that detects the position of the operating plate. In addition, the amount of rotation or the rotational velocity of the driving means is changed on the basis of position of the operating plate as detected by the position detection means.