A vehicle-to-vehicle communication device generates voice information that includes a voice message and added information regarding an output of the voice message. The voice information is transmitted in one direction of a subject vehicle via a transmission unit, and voice information from another vehicle is received via a reception unit. The vehicle-to-vehicle communication device plays the voice message of the voice information received by the reception unit based on the added information of the voice information. In such manner, information regarding a travel situation is appropriately transmitted by the vehicle-to-vehicle communication device.