A stereoscopic display device includes an image display device to display, for each imaging point inside a space region, an image of an object to be projected to the space region at the relevant imaging point in a block corresponding to the relevant imaging point on a display region, a lens to direct light beams given out from the respective blocks to mutually different directions, a light guide plate having first deflectors provided in any of an emission surface and a surface opposed to the emission surface, each of the first deflectors directing the light beams entering the light guide plate to mutually different directions to emit the light beams from the emission surface, and a second deflector configured to direct, for each of the first deflectors, the light beam from each of the blocks emitted from the emission surface through the first deflector to the corresponding imaging point.