A communication system (1) according to the present example embodiment includes a reception device (2) and a transmission apparatus (3) communicating with the reception device (2), and the transmission apparatus (3) includes a data processing unit (4) that encapsulates communication data relating to a communication when the communication data are unicast data, and does not encapsulate the communication data at least either when the communication data are multicast data or when the communication data are broadcast data, and a transmission unit (5) that transmits the communication data encapsulated by the data processing unit (4) to the reception device (2). With this, a communication system preventing increase in a communication load can be provided.