The invention concerns an elliptical optical module intended for a motor vehicle. The elliptical optical module comprises a reflector intended to receive a light source. The elliptical optical module also comprises a shield comprising at least one support flap and an optically active flap. The optically active flap obstructs at least part of the light rays emitted by the light source. The elliptical optical module also comprises a convex lens intended to receive at least part of the light rays. The elliptical optical module comprises elastic fixing means for holding the shield on a support piece.