A device for detecting the fuel pressure for a fuel injector, the fuel injector and fuel supply to a fuel injector

The invention relates to a device (50) for detecting a fuel pressure (P) for a fuel injector (10; 10a), with a as a piezoelectric element (51; 51a) structure of the measuring element (52) for detecting the fuel pressure (P), wherein the measuring element ( 52) is adapted to detect a deformation of the flow path formed in a wall defining a fuel supply to one (in an injector 11) high-pressure chamber (28). According to the invention it is provided that the fuel supply means in the area of ​​the measuring element (52) is curved or forming a bent flow path formed for the fuel.