A vehicle data storage system in which vehicle data obtained from a vehicle-mounted device is stored, comprising: a vehicle with a vehicle mounted device, means for detecting vehicle position data, and a vehicle data storage electronic control device ECU, the vehicle data storage electronic control device ECU comprising: a vehicle data storage portion in which the vehicle data is stored; a country determination portion configured to determine a country in which the vehicle exists, based on position data of the vehicle; a selection table storage portion in which the type of vehicle data that is permitted be stored in the vehicle data storage portion is stored in association with country data; a data determination portion configured to determine the type of vehicle data that is permitted be stored in the vehicle data storage portion, based on the country determined by the country determination portion, by referring to the selection table storage portion; a data processing portion configured to store, in the vehicle data storage portion, the vehicle data determined by the data determination portion; and a readout prohibition portion configured, when a request for reading out the vehicle data from the outside is detected, to obtain from the data determination portion the type of vehicle data that is permitted be stored based on the country determined by the country determination portion, and to prohibit the type of vehicle data that is not permitted to be stored from being readout in the determined country, among the vehicle data that have already been stored in the vehicle data storage portion. a vehicle with a vehicle mounted device, means for detecting vehicle position data, and a vehicle data storage electronic control device ECU, the vehicle data storage electronic control device ECU comprising: a vehicle data storage portion in which the vehicle data is stored; a country determination portion configured to determine a country in which the vehicle exists, based on position data of the vehicle; a selection table storage portion in which the type of vehicle data that is permitted be stored in the vehicle data storage portion is stored in association with country data; a data determination portion configured to determine the type of vehicle data that is permitted be stored in the vehicle data storage portion, based on the country determined by the country determination portion, by referring to the selection table storage portion; a data processing portion configured to store, in the vehicle data storage portion, the vehicle data determined by the data determination portion; and a readout prohibition portion configured, when a request for reading out the vehicle data from the outside is detected, to obtain from the data determination portion the type of vehicle data that is permitted be stored based on the country determined by the country determination portion, and to prohibit the type of vehicle data that is not permitted to be stored from being readout in the determined country, among the vehicle data that have already been stored in the vehicle data storage portion. a vehicle data storage portion in which the vehicle data is stored; a country determination portion configured to determine a country in which the vehicle exists, based on position data of the vehicle; a selection table storage portion in which the type of vehicle data that is permitted be stored in the vehicle data storage portion is stored in association with country data; a data determination portion configured to determine the type of vehicle data that is permitted be stored in the vehicle data storage portion, based on the country determined by the country determination portion, by referring to the selection table storage portion; a data processing portion configured to store, in the vehicle data storage portion, the vehicle data determined by the data determination portion; and a readout prohibition portion configured, when a request for reading out the vehicle data from the outside is detected, to obtain from the data determination portion the type of vehicle data that is permitted be stored based on the country determined by the country determination portion, and to prohibit the type of vehicle data that is not permitted to be stored from being readout in the determined country, among the vehicle data that have already been stored in the vehicle data storage portion.