To reduce the generation of resonance noise due to injection of fuel, in a fuel injection device for an engine.

In a fuel injection device constituted such that an injector 2 of each cylinder is coupled to a common rail 1 through high pressure fuel piping 4, each high pressure fuel piping 4 and the injector 2 are fastened against each other through a washer type mass body 8 having a different mass. This constitution can suppress the occurrence of resonance between the vibration system of a cylinder to inject fuel and the vibration system of a non-injection cylinder and can reduce the generation of vibration noise.