Abstract: An object of the present invention is to provide a fuel path sealing structure for a fuel injection valve that is capable of preventing a high pressure fuel leak by increasing the seal surface pressure between a first body such as an injector housing, and a second body such as a nozzle body to thus permit an increase in the seal surface pressure without a change to the size of the nozzle nut or the corresponding tightening force. The present invention is directed toward the formation, over a predetermined surface area, of slightly shallow micro-recesses, in regions other than the high pressure fuel paths and the periphery of the seal surfaces, that is, at the center of the seal surface.