Provided is a display device which can perform, with a simpler structure, switching between naked-eye 3D image display by a parallax barrier method and 2D image display without a decrease in resolution. In order to reduce manufacturing cost by reducing the number of polarizing plates, a light-shuttering portion including a polymer-dispersed liquid crystal which does not need a polarizing plate is used as a parallax barrier. Further, a light source portion serving as a backlight is formed using a light source including an EL element which forms a planar light source and does not need a diffusion plate. Furthermore, as the light source portion serving as the backlight, a plurality of EL elements are provided so that the plurality of EL elements are selectively controlled and thus selective light emission is performed.