EMERGENCY REPORTING DEVICE FOR VEHICLE

An emergency reporting device for a vehicle includes an emergency detector and a communicator. The emergency detector is configured to detect or estimate an emergency including a collision of the vehicle. The communicator is configured to, when the emergency of the vehicle is detected or estimated, transmit information related to the emergency to outside so that a succeeding vehicle receives the information related to the emergency. The communicator is configured to, after the information related to the emergency is transmitted, receive acknowledgment information from the succeeding vehicle about reception of the information related to the emergency.