Abstract: A sign holder for a window of a vehicle, such as a station wagon, car or pick-up truck, in which a panel for displaying a sign is supported by one or more fixtures, each of the fixtures having a tubular member normally extending vertically at the rear of said panel and having reciprocable shafts extending out of the upper and lower ends. The shafts are provided with shoes which seat on the frame of the window, and the panel is held in spaced relation to the window to permit circulation of air and thus minimize condensation on the window and face of the sign. A spring or other resilient member is disposed between the shafts for urging the shafts upwardly and downwardly to seat the shoes on their respective window frame members.