To reliably detect, without adding new parts, injection abnormality not only when fuel injection is not performed but also including fuel injection in a state where the injection quantity has fallen abnormally low. In a state where a flow rate control valve is controlled in a closed loop, a pressure control valve is controlled in an open loop and an indicated injection quantity of fuel that should be injected from fuel injection valves arithmetically calculated by predetermined arithmetic processing on the basis of the operating state of an engine exceeds zero, when it has been determined that the difference between a minimum fuel through-flow rate in the flow rate control valve determined by a predetermined map from an engine speed Ne and the indicated injection quantity and a fuel through-flow rate decided in closed loop control of the flow rate control valve is larger than a predetermined threshold value K, it is determined there is injection abnormality.