In order to allow windows of a vehicle to be marked using a laser in a reliable manner, the present invention provides an apparatus for marking a vehicle comprising a laser emitter (4) for producing a laser beam, laser beam delivery means (5), a marking head (6) comprising means for deflecting the laser beam into a path defining a mark, an arm comprising at least two arm sections (7, 8) articulated with respect to one another, the marking head (6) being mounted on one of the arms, so that the marking head (6) can be moved into contact with the part of the vehicle to be marked. Means are provided for driving the arm sections (7 and 8). A controller (17) is provided for controlling the driving means, laser emitter (4) and the marking head (6) is provided so that a mark can be made on a selected part of the vehicle.