FUEL INJECTOR

The invention relates to a fuel injector (10), in particular a common-rail injector, having an injector housing (11) in which a high-pressure chamber (15) is formed, which can be supplied with pressurized fuel via a supply bore (19) arranged in the injector housing (11), having at least one injection opening (12) formed in the injector housing (11) and connected at least indirectly to the high-pressure chamber (15) for injecting fuel into the combustion chamber of an internal combustion engine, having an injection member (16) which opens or closes the at least one injection opening (12), and having a measuring device (30) for at least indirectly detecting the pressure in the high-pressure chamber (15) or the supply bore (19), wherein the measuring device (30) is configured to detect an elastic deformation of a deformation region (27) arranged in operative connection at least indirectly with the supply bore (19) or the high-pressure chamber (15), wherein the measuring device (30) has a piezoelectric element (41) which is accommodated in a receiving chamber (43) in a housing (35) made of metal and connected to the injector housing (11) via a welded connection (38). According to the invention, it is provided that the measuring device (30) rests against the deformation region (27) with the interposition of a rigid intermediate disc (52) consisting in particular of metal.