The present invention is to provide an electric display device turning base capable of stabilizing and turning a direction of a thin-screen display device. This display device turning base is provided with a first base portion; a mounting and fixing portion; a pair of arc guide rails installed in the mounting and fixing portion in such a manner that a center point of an arc thereof is arranged on a horizontal line passing through a gravity center of the thin-screen display device mounted and fixed to the mounting and fixing portion and extending in a left and right direction; a support roller for supporting the arc guide rails turnably around the horizontal line in a state that the center point of the arc guide rails is arranged on the horizontal line, the support roller being rotatably installed in the first base portion in a standing manner; and an electric drive mechanism for turning the arc guide rails around the horizontal line.