Fluid injection assembly for a combustion engine having a central longitudinal axis and comprising: - an injector body having a notch, - an injector cup, which radially encloses an axial end of the injector body and has a projecting part, - a spring clip which is arranged between the injector body and the injector cup and comprises a ground plate, at least one spring element coupled with the ground plate, and at least one holding element extending in the direction of the longitudinal axis and engaging behind the projecting part of the injector cup, wherein - 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 means of mechanical interaction via the projecting part and the notch, respectively, - the projecting part is a collar around an opening of the injector cup through which the injector body extends into the injector cup, - the at least one holding element extends longitudinally through a groove of the projecting part and comprises a further projecting part, - the projecting part of the injector cup is arranged between the further projecting part and the ground plate, - the spring element abuts the projecting part of the injector cup such that a spring force is exerted by the spring clip biasing the injector body and the injector cup away from one another, and - the holding element and the injector cup comprise two common contact areas (120, 121) axially spaced apart from each other to avoid an inclination between the injector cup and the holding element, one of the contact areas being arranged at the groove and the other contact area being arranged at the further projecting part, characterized in that the spring clip comprises two holding elements and the holding elements are laterally bendable for insertion of the holding elements into the groove. - an injector body having a notch, - an injector cup, which radially encloses an axial end of the injector body and has a projecting part, - a spring clip which is arranged between the injector body and the injector cup and comprises a ground plate, at least one spring element coupled with the ground plate, and at least one holding element extending in the direction of the longitudinal axis and 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 means of mechanical interaction via the projecting part and the notch, respectively, - the projecting part is a collar around an opening of the injector cup through which the injector body extends into the injector cup, - the at least one holding element extends longitudinally through a groove of the projecting part and comprises a further projecting part, - the projecting part of the injector cup is arranged between the further projecting part and the ground plate, - the spring element abuts the projecting part of the injector cup such that a spring force is exerted by the spring clip biasing the injector body and the injector cup away from one another, and - the holding element and the injector cup comprise two common contact areas (120, 121) axially spaced apart from each other to avoid an inclination between the injector cup and the holding element, one of the contact areas being arranged at the groove and the other contact area being arranged at the further projecting part,