PURPOSE: To obtain a stable recirculation amount and limit static diffusion of the recirculation amount to minimum by forming a semi-spherical flatened surface on an outer periphery of a valve closure member, and limiting the flattened surface by means of a deflecting surface extending in respect to the flattened surface with a specified angle.

CONSTITUTION: A fuel injection valve has a tubular valve seat 1 in which a longitudinal opening 3 is formed concentrically with a valve seat longitudinal axis 2. A tubular valve needle 5, for instance, is arranged inside the longitudinal opening 3, while a spherical valve closure member 7 is connected to an end 6 of a downstream side of the valve needle 5. The valve closure member 7 interlocks with a valve seat surface 29 of a valve seat 16 conically tapered in a flowing direction, and has a flattened surface 80 at its outer periphery. The flattened surface 80 is semi-sherically formed by milling or grinding the surface of the spherical valve closure member 7. A deflecting surface 41 is determined, which is deflected obliquely in respect to an equatorial surface 39 of the valve closure member 7 by, for instance, 45 degrees.