NOVELTY - The body i.e. fuel cell vehicle (2), has a control unit i.e. communicative filling electronic control unit (ECU) (51) comprising a communication continuation determination unit for determining whether continued execution of communicative filling is made while executing the communicative filling. A filling method switching unit interrupts communicative filling during execution and continuing filling of the fuel gas by switching a filling process to a non-communicative filling with respect to the determination unit determining that continuation of communicative filling is not made.    USE - Moving body, for filling fuel gas from an external supply device i.e. dispenser, into a storage vessel i.e. high-pressure tank. Uses include but are not limited to a fuel cell vehicle such as natural gas vehicle, motorbike, ship, spacecraft and robot.    ADVANTAGE - The body allows more fuel gas to be filled from an external supply device into the storage vessel, prevents unnecessary switching of the communication power source, and reduces the energy loss accompanying the switching of the communication power source. The body reduces filling amount of hydrogen or interrupts the filling of hydrogen forcibly, and prevents communicative filling based on false information from the vehicle side. The body continues filling of hydrogen by appropriately determining that continuation of filling is made despite the continuation of communicative filling is not made even if the temperature sensor or pressure sensor having failed. The amount of charge in the communication power source during communicative filling does not fall below the minimum required amount in order to guarantee normal operation of the communicative filling ECU and an infrared transmitter and to prevent inaccurate data signals from being transmitted from a communication system.    DETAILED DESCRIPTION - The communication continuation determination unit and the filling method switching unit are designed as communicative filling ECUs.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of a hydrogen filling system configured by a vehicle and a hydrogen gas station.'(Drawing includes non-English language text)'    Fuel cell vehicle (2)    Communicative filling ECU (51)    Low-voltage battery (52)    Infrared LED (54)    Voltage sensor (58)