A portable electronic device comprising: a plurality of subscriber identity modules, each subscriber identity module having an IC chip in which an IC card system operating system, OS, is mounted; and a communicator configured to perform non-contact communication with a reader/writer device to which an external device among a plurality of external devices is connected, the communicator configured to change a transmission destination to a subscriber identity module corresponding to a transmission destination identifier for identifying the transmission destination among the plurality of subscriber identity modules on the basis of the transmission destination identifier and of a change-instruction-information giving instructions to change the transmission destination, wherein the transmission destination identifier and the change-instruction-information are assigned to message data received from the reader/writer device using the non-contact communication, and the communicator configured to transmit the message data received from the reader/writer device to the subscriber identity module, characterized in that the message data is assigned with node address information, NAD, of a telegraph block of a non-contact communication protocol, the node address information including the transmission destination identifier, a transmission source identifier for identifying a transmission source, and the change-instruction-information, and the communicator is configured to change the transmission destination to another subscriber identity module of the plurality of subscriber identity modules corresponding to the transmission destination identifier when the change-instruction-information included in the node address information indicates an instruction to change the transmission destination. a plurality of subscriber identity modules, each subscriber identity module having an IC chip in which an IC card system operating system, OS, is mounted; and a communicator configured to perform non-contact communication with a reader/writer device to which an external device among a plurality of external devices is connected, the communicator configured to change a transmission destination to a subscriber identity module corresponding to a transmission destination identifier for identifying the transmission destination among the plurality of subscriber identity modules on the basis of the transmission destination identifier and of a change-instruction-information giving instructions to change the transmission destination, wherein the transmission destination identifier and the change-instruction-information are assigned to message data received from the reader/writer device using the non-contact communication, and the communicator configured to transmit the message data received from the reader/writer device to the subscriber identity module, characterized in that the message data is assigned with node address information, NAD, of a telegraph block of a non-contact communication protocol, the node address information including the transmission destination identifier, a transmission source identifier for identifying a transmission source, and the change-instruction-information, and the communicator is configured to change the transmission destination to another subscriber identity module of the plurality of subscriber identity modules corresponding to the transmission destination identifier when the change-instruction-information included in the node address information indicates an instruction to change the transmission destination.