Abstract: YAn apparatus for and a method of adjustment, in the lateral direction, of the light beam of a vehicle headlight, in its low beam position. The light beam extends on one side of a cut-off line. At least two vertically extending, elongated photoelectric cells are placed in the light beam, in such a manner that the upper part of each photoelectric cell is not illuminated by the headlight and which the lower part is illuminated, regardless of the position of adjustment, in the vertical direction, of the headlight. When the headlight is at its position of correct lateral adjustment, the electrical signals supplied by the photoelectric cells have a specified ratio. In laterally adjusting the position of the headlight, the electrical signals supplied by the photoelectric cells are brought to the specified ratio.