A fuel injection control device for an internal combustion engine, comprising: a high-voltage generating circuit for generating a high voltage exceeding a battery voltage which is a voltage for driving an injector injecting fuel into a cylinder of the internal combustion engine, the battery voltage and the high voltage being used to supply a hold current (Ih), as well as a valve-opening current (Ip) as a driving current, to the injector, wherein the fuel injection control device is configured to output a fuel injection pulse signal to the injector in a plurality of fuel injection timings during one cycle of combustion, and to calculate a restoration time required for the high-voltage generating circuit to restore the high voltage to a predetermined value, after the high voltage is consumed by the driving of the injector and decreases, and when the injection of fuel by any other injector into another cylinder of the internal combustion engine is demanded during the calculated restoration time, to check whether a difference between the demanded fuel injection timing of the injector and the demanded fuel injection timing of the other injector is within a predetermined data range or not and to identify the injector between both injectors, where the fuel injection has less influence upon the combustion in the internal combustion engine, wherein, if said difference is within a predetermined data range, the fuel injection control device is further configured to correct the start of the fuel injection timing of the identified injector so as to execute fuel injection by the injector and the other injector into the cylinder and the other cylinder simultaneously, while adapting the injection duration of the injector and the other injector for compensating the simultaneous injection, and wherein if said difference is outside the predetermined data range, the fuel injection control device is further configured to correct the start of the fuel injection timing of the identified injector, so that the calculated restoration time is provided between the fuel injection timings of the injector and the other injector. a high-voltage generating circuit for generating a high voltage exceeding a battery voltage which is a voltage for driving an injector injecting fuel into a cylinder of the internal combustion engine, the battery voltage and the high voltage being used to supply a hold current (Ih), as well as a valve-opening current (Ip) as a driving current, to the injector, wherein the fuel injection control device is configured to output a fuel injection pulse signal to the injector in a plurality of fuel injection timings during one cycle of combustion, and to calculate a restoration time required for the high-voltage generating circuit to restore the high voltage to a predetermined value, after the high voltage is consumed by the driving of the injector and decreases, and when the injection of fuel by any other injector into another cylinder of the internal combustion engine is demanded during the calculated restoration time, to check whether a difference between the demanded fuel injection timing of the injector and the demanded fuel injection timing of the other injector is within a predetermined data range or not and to identify the injector between both injectors, where the fuel injection has less influence upon the combustion in the internal combustion engine, wherein, if said difference is within a predetermined data range, the fuel injection control device is further configured to correct the start of the fuel injection timing of the identified injector so as to execute fuel injection by the injector and the other injector into the cylinder and the other cylinder simultaneously, while adapting the injection duration of the injector and the other injector for compensating the simultaneous injection, and wherein if said difference is outside the predetermined data range, the fuel injection control device is further configured to correct the start of the fuel injection timing of the identified injector, so that the calculated restoration time is provided between the fuel injection timings of the injector and the other injector.