Fuel injection device

The invention has an object for improving response of a fuel injection device. A flow-in recessed portion (72a) and a flow-out recessed portion (74a) are formed at a press-contacting surface of a floating plate (70), which is movably accommodated in a pressure control chamber (53). A flow-in port (52b) and a flow-out port (54b) are formed at a pressure control surface (53b) of a valve body (46). The flow-in port (52b) is opened to the flow-in recessed portion (72a), while the flow-out port (54b) is opened to the flow-out recessed portion (74a). When the floating plate (70) is moved upwardly and the press-contacting surface is brought into contact with the pressure control surface (53b), the flow-in port (52b) is surely closed.