Abstract: A splash guard for vehicles having a main panel of conventional splash guard form. The main panel is mounted on a vehicle behind the wheels to control splash. In association with the main panel is a secondary panel that is hinged on the back face of the main panel. The secondary panel is shorter and wider than the main panel so that the projecting ends act as wings and catch the air passing the main panel when the vehicle is in motion. The two panels carry separate indicia, with indicia on the main panel being normally hidden by the secondary panel until the air passing the main panel lifts the secondary panel to expose the indicia on the main panel. The splash guard may be used for displaying advertizing, slogans, humorous sayings or illustrations.