PURPOSE: To provide a fuel injection device for an internal combustion engine capable of sufficiently and correctly controlling the size of preliminary injection quantity, an interval between the preliminary injection quantity and main injection quantity, and the main injection quantity.

CONSTITUTION: A sensor 61 designed and composed as a needle stroke sensor disposed on an injection valve 33 connected through a delivery duct 29 to a pump actuation chamber 7 outputs a signal to opening action or closing action of an injection needle to a control device 51 to control an electrically operated valve 23 only after the injection needle starts action in an opening direction or a closing direction to get over or under a specified limit value.