Abstract: A sign display device for use in vehicles such as automobiles comprising a variable height sign holder extendibly mounted on a housing or frame which has an attachment means for holding the display device on a vehicle door or similar structure. The variable height sign holder is a manually extendible structure preferably comprising a series of pairs of lever arms pivotally fastened together in the center on the ends to adjacent pairs so as to form a scissors action structure. An actuation handle is mounted on one end of the pairs of lever arms to move the ends closer together and extend the sign holder. A sign or card holder frame is positioned on an upper end of the pairs of lever arms for holding the signs to be displayed by, or stored in, the display device.