A vehicle communication device for use in a vehicle includes a data acquisition unit for acquiring captured images as travel data; a data generator for generating transmission data from the travel data for transmission to a data center; and a data transmitter transmitting the transmission data generated by the data generator to the data center. When there is a plurality of different travel data types, the data generator can increase the priority of any of the travel data types based on a data center necessity level, and prioritize the transmission of the transmission data generated from prioritized travel data.