PROBLEM TO BE SOLVED: To achieve both acquiring vehicle data from a vehicle network and avoiding occurrence of various problems such as communication delay of the vehicle network and the like.SOLUTION: A vehicle data communication device 1 permits transmission and reception of vehicle data between a vehicle network connection part 3 and a vehicle network 10 when identifying that the vehicle is stopped, and prohibits transmission and reception of the vehicle data between the vehicle network connection part 3 and the vehicle network 10 when identifying that the vehicle is stopped. During stop with a relatively low communication load of the vehicle network 10, the vehicle data can be acquired from the vehicle network 10, and during travel with a relatively high communication load of the vehicle network 10, increase in the communication load of the vehicle network 10 can be suppressed.
