FUEL INJECTOR

The invention relates to a fuel injector (10), in particular a common-rail injector, with 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), with at least one injection opening (12) formed in the injector housing (11) and at least indirectly connected to the high-pressure chamber (15) for injecting fuel into the combustion chamber of an internal combustion engine, with an injection member (16) that releases or closes the at least one injection opening (12), and with 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 designed to detect an elastic deformation of a deformation region (27) arranged in operative connection with the supply bore (19) or the high-pressure chamber (15) at least indirectly, wherein the measuring device (30) comprises a sensor element (32) having a base surface (40) and a peripheral surface (45), which is connected on the side facing the deformation region (27) with the deformation region (27) via a first cohesive connection (41), and wherein the sensor element (32) is designed to detect stresses occurring in the deformation region (27) during a deformation.