Valve device for a fuel injection valve

The present invention aims to reduce the volume of the volume present in the radially outward from the nozzle hole of the cavity, it is possible to promote the atomization of the fuel spray, the fuel injection valve which can suppress the occurrence of flow change caused by the atmosphere pressure change get the valve device. The valve device of a fuel injection valve according to the invention, the axial height of the cavity, at least, a constant in the radial area of ​​the opening of the valve seat to the intersection position of the axis of the top surface and the injection hole of the injection hole plate , and the outer peripheral wall surface of the cavity, the axis of the central axis of the opening, and the tapered surface of the frusto-conical diameter toward the upstream side is reduced, the upstream side surface of the cavity and the tapered has a joint Earl shaped connecting the surface, a portion of the opening of the injection hole in the upper surface of the injection hole plate, viewed from the axial direction of the central axis, and overlaps with the outer peripheral wall surface.