Patent ID: 8052073

Claim:
A fuel injection valve, comprising: a valve main body of a hollow tubular shape; a needle valve provided to the valve main body in a slidable manner; and a valve seat having a guide portion configured to guide the needle valve, a seat portion provided downstream of the guide portion and configured to abut on the needle valve when the needle valve is closed, and an injection hole formed downstream of the seat portion, wherein: an annular passage communicating in a circumferential direction is defined between an inner peripheral surface of the valve main body and an outer peripheral surface of the guide portion and a fuel passage through which to introduce a fuel from the annular passage to the seat portion is defined; and a filter of almost a cylindrical shape to trap foreign matter heading toward the fuel passage is provided to the annular passage, wherein: the entire filter is made of one of porous resin and porous metal and a minor diameter thereof is set to a size large enough to be press-fit to the outer peripheral surface of the guide portion.