An automated teller machine, comprising: a cassette including a plurality of storage parts (120, 121, 122) configured to store a paper medium, and a case having a plurality of entrances (111, 112) configured to let a paper medium which is to be accumulated in the storage part and a paper medium which is withdrawn from the storage parts pass through; a strongbox protection wall covering the cassette and having an external entrance configured to let a paper medium which is to be loaded into and a paper medium which is to be unloaded from the cassette pass through; an external conveyance path extending to penetrate the strongbox protection wall through the external entrance, the external conveyance path being disposed outside the case of the cassette; a plurality of external branch conveyance paths extending between the external conveyance path and the entrances of the case, respectively; a cassette accommodation part configured to provide a space for accommodating the cassette; a conveyance path support part configured to support the external conveyance path and the external branch conveyance paths and configured to open and close the cassette accommodation part so that the cassette is selectively exposed to the outside; and an actuator provided in the conveyance path support part to generate a driving force for loading and unloading the paper medium into and from the storage parts, and an accumulation withdrawal operation part provided in the cassette to receive the driving force generated by the actuator to perform an operation of accumulating the paper medium in the storage parts and an operation of withdrawing the paper medium from the storage parts. a cassette including a plurality of storage parts (120, 121, 122) configured to store a paper medium, and a case having a plurality of entrances (111, 112) configured to let a paper medium which is to be accumulated in the storage part and a paper medium which is withdrawn from the storage parts pass through; a strongbox protection wall covering the cassette and having an external entrance configured to let a paper medium which is to be loaded into and a paper medium which is to be unloaded from the cassette pass through; an external conveyance path extending to penetrate the strongbox protection wall through the external entrance, the external conveyance path being disposed outside the case of the cassette; a plurality of external branch conveyance paths extending between the external conveyance path and the entrances of the case, respectively; a cassette accommodation part configured to provide a space for accommodating the cassette; a conveyance path support part configured to support the external conveyance path and the external branch conveyance paths and configured to open and close the cassette accommodation part so that the cassette is selectively exposed to the outside; and an actuator provided in the conveyance path support part to generate a driving force for loading and unloading the paper medium into and from the storage parts, and an accumulation withdrawal operation part provided in the cassette to receive the driving force generated by the actuator to perform an operation of accumulating the paper medium in the storage parts and an operation of withdrawing the paper medium from the storage parts.