Abstract: The invention relates to a fuel injector for a turbine engine, comprising a body having a fuel inlet opening into an upstream chamber and a fuel outlet connected to a downstream chamber, a metering valve being mounted between the upstream chamber and the downstream chamber, said valve being subjected to the action of an elastic return spring tending to return the valve to a closed position, the spring (11) and the valve being designed to allow the opening of the valve and to allow the passage of fuel from the upstream chamber to the downstream chamber, above a given fuel pressure in the upstream chamber, the return spring (11) extending along the axis (X) of movement of the valve, characterized in that the spring (11) has a first axial end and a second axial end, both annular, connected to one another by at least two helical parts (11c, 11d) elastically deformable in the axial direction (X).