PURPOSE: To realize compactness by providing an electric injection quantity control mechanism rotating a plunger in an integral type electronic control fuel injection valve and a hydraulic injection timing control mechanism expanding and contracting the distance between the plunger and a rocker arm integrally in the axial direction of the plunger.

CONSTITUTION: A unit injector is made by inserting an injection valve body X, an injection pump Y and a piston unit Z to an almost straight body 1 from the tip concentrically sequentially. An electric fuel injection quantity control mechanism 100 including a control sleeve 103c is coaxially provided so as to surround a plunger 11 slidably and rotatably in a barrel 12 of the injection pump Y. And a hydraulic injection timing control mechanism 120 expanding and contracting the distance L1 between the plunger 11 and a rocker arm 62 is provided on an upper end portion of the body 1 coaxially with the plunger 11, and the mechanism is constructed with a tappet 31 slid by working oil whose pressure is regulated by an electronic fuel injection timing control means 130.