Abstract: This invention is embodied with a headlight (10) for motor vehicles or other road vehicles which comprises at least one transparent lens (11) and at least one parabolic mirror (12), perhaps assembled together with a spacer (13), at least the parabolic mirror (12) being adjustable in relation to the trim of the vehicle, the headlight including at least one rotatable connection means (20-21) defining an axis (41) of rotation about which at least the parabolic mirror (12) can swing so as to perform a first adjusting movement (34), such axis (41) of rotation being displaced towards such transparent lens (11).