A banknote handling apparatus that performs at least one of a banknote depositing process and a dispensing process and transports a banknote along a transport path, comprising: a transport member (136, 138) that is slidable along a widthwise direction of the transport path and transports the banknote in both forward and reverse directions along the transport path; a banknote detection unit that is arranged on an upstream side of the transport member (136, 138) in a banknote transport direction along the transport path and detects a position of the banknote in the widthwise direction of the transport path; and a control unit that calculates an amount of movement of the transport member (136, 138) based on a position of the banknote in the widthwise direction of the transport path detected by the banknote detection unit and a previously set predetermined position of the banknote in the widthwise direction of the transport path and performs a control so as to slide the transport member (136, 138) by the calculated movement amount when the banknote is transported by the transport member (136, 138), characterized in that the transport member (136, 138) is arranged in a first guide portion (132, 134) that constitutes the transport path, the first guide portion (132, 134) is slidable along the widthwise direction of the transport path integrally with the transport member (136, 138), the first guide portion (132, 134) comprises a pair of first guide portions (132, 134) arranged so as to be separated from each other, in which the transport path is formed between the first guide portions (132, 134), and the pair of first guide portions (132, 134) is movable so that a distance between the first guide portions (132, 134) on an inlet side of the transport path arranged between the pair of the first guide portions (132, 134) and a distance between the first guide portions (132, 134) on an outlet side of the transport path can be respectively changed. a transport member (136, 138) that is slidable along a widthwise direction of the transport path and transports the banknote in both forward and reverse directions along the transport path; a banknote detection unit that is arranged on an upstream side of the transport member (136, 138) in a banknote transport direction along the transport path and detects a position of the banknote in the widthwise direction of the transport path; and a control unit that calculates an amount of movement of the transport member (136, 138) based on a position of the banknote in the widthwise direction of the transport path detected by the banknote detection unit and a previously set predetermined position of the banknote in the widthwise direction of the transport path and performs a control so as to slide the transport member (136, 138) by the calculated movement amount when the banknote is transported by the transport member (136, 138), characterized in that the transport member (136, 138) is arranged in a first guide portion (132, 134) that constitutes the transport path, the first guide portion (132, 134) is slidable along the widthwise direction of the transport path integrally with the transport member (136, 138), the first guide portion (132, 134) comprises a pair of first guide portions (132, 134) arranged so as to be separated from each other, in which the transport path is formed between the first guide portions (132, 134), and the pair of first guide portions (132, 134) is movable so that a distance between the first guide portions (132, 134) on an inlet side of the transport path arranged between the pair of the first guide portions (132, 134) and a distance between the first guide portions (132, 134) on an outlet side of the transport path can be respectively changed.