To prevent the deterioration of the responsiveness of a fuel control system due to response delay in a fuel injector in which fuel injection and non-injection by an injector is switched over by opening/closing solenoid valves, by arranging a plurality of solenoid valves in series or in parallel to a fuel relief passage, and alternately opening/closing the solenoid valves.

An accumulator fuel injection valve 10 has a nozzle 16 equipped with a plurality of injection holes for ejecting fuel and a fuel reservoir 14, and a needle valve 18 which controls the communication between the fuel reservoir 14 and the injection holes 12 is slidably fitted to the inside of the nozzle 16. An oil pressure piston 28 is slidably fitted to the inside of an oil chamber 26 formed in a nozzle holder 20 so as to be coaxially arranged against the needle valve 18 and a bush rod 22. An orifice 84 and two-way solenoid valves 81, 82 are sequentially arranged in series from a part to the solenoid valve 81 in the oil chamber 26 of the fuel injection valve 10 and the oil passage 87 of the oil chamber 26, and these solenoid valves 81, 82 are alternately opened/ closed or simultaneously opened so as to control fuel injection and interruption, therefore the accurate opening/closing control of the needle valve 18 is ensured within a short time.