A coin handling apparatus comprising: a drawer attachment unit to which a drawer for a register is attached; a first cassette attachment unit to which a coin transport cassette is attached, the coin transport cassette comprising an opening and giving or receiving a coin to or from a specific apparatus (13,23) via the opening, the opening being opened when the coin transport cassette is attached to the specific apparatus (13, 23); a storage unit comprising storage boxes (238A-238H) that are configured to store the coin of predetermined denominations, and feeds out the coin that has been stored; a first transport unit that transports the coin fed out of the storage unit to the drawer attached to the drawer attachment unit or the coin transport cassette attached to the first cassette attachment unit, the first transport unit comprising a first route and a second route; a switching unit that is configured to switch a guide destination of the coin stored in the storage unit to the first route that guides the coin fed out of the storage unit to the drawer attached to the drawer attachment unit or to the second route that guides the coin fed out of the storage unit to the coin transport cassette attached to the first cassette attachment unit; a housing in which the storage unit, the first transport unit and the switching unit are provided; a drawer portion in which the drawer attachment unit and the first cassette attachment unit are provided, the drawer portion being insertable into a lower portion of the housing and capable of being drawn from the lower portion of the housing; and a control unit, wherein the first cassette attachment unit is provided at a position different from a position of the drawer attachment unit and configured to allow the coin transport cassette to be attached to the first cassette attachment unit when the drawer is attached to the drawer attachment unit, and the control unit is configured to control the storage unit, the first transport unit and the switching unit such that the coin stored in the storage unit is transported to the drawer attached to the drawer attachment unit, and when replenishing of the drawer with the coin is completed, the control unit is configured to control the storage unit and the switching unit such that the coin is fed out from the storage unit and is guided to the second route and to the coin transport cassette, so that the coin transport cassette and the drawer are replenished with coin of predetermined denominations by a predetermined number. a drawer attachment unit to which a drawer for a register is attached; a first cassette attachment unit to which a coin transport cassette is attached, the coin transport cassette comprising an opening and giving or receiving a coin to or from a specific apparatus (13,23) via the opening, the opening being opened when the coin transport cassette is attached to the specific apparatus (13, 23); a storage unit comprising storage boxes (238A-238H) that are configured to store the coin of predetermined denominations, and feeds out the coin that has been stored; a first transport unit that transports the coin fed out of the storage unit to the drawer attached to the drawer attachment unit or the coin transport cassette attached to the first cassette attachment unit, the first transport unit comprising a first route and a second route; a switching unit that is configured to switch a guide destination of the coin stored in the storage unit to the first route that guides the coin fed out of the storage unit to the drawer attached to the drawer attachment unit or to the second route that guides the coin fed out of the storage unit to the coin transport cassette attached to the first cassette attachment unit; a housing in which the storage unit, the first transport unit and the switching unit are provided; a drawer portion in which the drawer attachment unit and the first cassette attachment unit are provided, the drawer portion being insertable into a lower portion of the housing and capable of being drawn from the lower portion of the housing; and a control unit, wherein the first cassette attachment unit is provided at a position different from a position of the drawer attachment unit and configured to allow the coin transport cassette to be attached to the first cassette attachment unit when the drawer is attached to the drawer attachment unit, and the control unit is configured to control the storage unit, the first transport unit and the switching unit such that the coin stored in the storage unit is transported to the drawer attached to the drawer attachment unit, and when replenishing of the drawer with the coin is completed, the control unit is configured to control the storage unit and the switching unit such that the coin is fed out from the storage unit and is guided to the second route and to the coin transport cassette, so that the coin transport cassette and the drawer are replenished with coin of predetermined denominations by a predetermined number.