A fluid injection assembly for a combustion engine includes an injector body having a notch, an injector cup, which radially encloses an axial end of the injector body and has a projecting part, and a spring clip arranged between the injector body and the injector cup. The spring clip includes a ground plate, at least one spring element, and at least one holding element engaging behind the projecting part of the injector cup. The ground plate is arranged in the notch of the injector body. The injector body and the injector cup are coupled together by the spring clip by mechanical interaction via the projecting part and the notch, respectively.