Advertising display for vehicles; of the type that comprises strips of a flexible material that include posters or graphics, the strips moving alternately between rollers at each end by means of the corresponding motorisation (5), transmission, position-capturing and control elements (8), equipped with a frame (2) and protective casing with windows in the intermediate areas of the path of the strips for displaying the posters or graphics, and equipped with inner lighting; characterised in that it comprises two pairs of horizontal lateral rollers (3a,3b,4a,4b), each pair having an upper roller and a lower roller, and each pair of rollers having a separate flexible strip with the posters or advertisements that follow an appreciably vertical path.