IN-VEHICLE NETWORK SYSTEM

A network hub device used for building a simple network configuration in an in-vehicle network system is provided. A network hub device () is provided in a vehicle body and is coupled to a trunk network through which a digital control signal is transmitted. A sub hub device () performs input/output of a signal to/from an in-vehicle device provided in a partial body assembled to the vehicle body via a movable portion. The sub hub device () is provided in the partial body and the digital control signal is transmitted/received between the sub hub device () and the network hub device () via a wire harness passing through the movable portion.