A money depositing/dispensing device includes an inventory amount obtaining unit, a virtual inventory amount setting unit, and a device inventory amount management unit. The inventory amount obtaining unit is configured to count money to be stored in a storage unit and count money fed from the storage unit, thereby successively obtaining an inventory amount in the storage unit. The virtual inventory amount setting unit is configured to set an inventory amount of banknotes which are not present in the device but should be treated as money present in the device, as a virtual inventory amount. The device inventory amount management unit is configured to manage, as an inventory amount in the device, a sum of the inventory amount in the obtained by the storage unit inventory amount obtaining unit and the virtual inventory amount set by the virtual inventory amount setting unit.