Patent ID: 7021570

Claim:
A fuel injection device comprising: a valve body that includes: a downstream end opening; a fuel passage communicated with the downstream end opening; and a valve seat located adjacent to the downstream end opening; a valve member that is located radially inward of the valve body and is seatable against the valve seat of the valve body; an injection hole plate that includes a cover wall, which covers the downstream end opening of the valve body, wherein the cover wall includes: a thin wall portion, through which at least one injection hole is defined; and a thick wall portion, which is located radially outward of the thin wall portion and has a wall thickness greater than that of the thin wall portion; and a nozzle holder that receives the valve body, wherein: the nozzle holder includes a support portion, which supports a downstream end surface of the cover wall of the injection hole plate; and a portion of the injection hole plate, which is located radially outward of the thick wall portion, is welded to one of the valve body and the nozzle holder.