To communicate the information outside and inside a vehicle room based on an occupant's condition when an accident occurs.

Questions are asked by announcing while a communication circuit is being established, and whether a voice is an occupant's voice or not is judged based on a microphone input level within a predetermined time for the announcement urging speaking (S106, S114). When it is judged that the voice is the occupant's voice, a communication channel is selected to perform communication through speaking (S120). When it is judged that the voice is not the occupant's voice, noise cancel is made invalid, and data communication channel is selected to perform data communication (S124, S126). The destination for reporting can understand a situation of the accident based on the conversion with the occupant or the analysis of sounds outside and inside the vehicle room to cope with it more properly.