To provide a fuel injection device to reduce the fluctuation of the output torque of an engine.

High pressure fuel fed from a high pressure feed pump 7 is accumulated in a common rail 4 and fuel is fed to an injector, arranged at the cylinder of an internal combustion engine, through the common rail 4 for injection. The high pressure feed pump 7 of a fuel injection device is driven according to rotation of an internal combustion engine, and setting is effected such that a time at which output torque during the combustion process of the internal combustion engine attains a peak approximately coincides with a time of a forced feed by the plunger 15 of the high pressure feed pump 7.