Abstract: A headlight for a motor vehicle equipped with an optical module comprising a support carrying a light source and an optical system for emitting a light beam, the optical module being mounted so as to be able to move on the headlight about a pivot axis by means of mobility means that associate means of pivotal mounting of the support on a chassis of the headlight using an actuator in relationship with at least one drive member in engagement on the support. The means of pivotal mounting of the support comprise a single articulation bearing: situated below and supporting the optical module, taking up the forces, in particular axial and radial, due to the optical module and thus separating the drive member or members of the force chains.