A structure of a wireless communication device for calling an emergency report center via a cellular phone network is simplified. Further, provision is made so that voice communication can be established with the emergency report center from anywhere. To provide such an advantage, a built-in wireless communication section is used to transmit data, including a phone number of a cellular phone possessed by a user in a vehicle when an emergency report is made to the emergency report center via the cellular phone network. An operator in the emergency report center uses the phone number of the cellular phone to establish voice communication with the user. Since the built-in wireless communication section does not require a voice communication circuit, the wireless communication device structure can be simplified to reduce a size and cost of the device. Further, the emergency report center can establish voice communication with the user even when the user has to stay away from the vehicle depending on a situation.