A stereoscopic display device includes a display unit. The display unit includes a plurality of pixels. A scan driving unit sequentially applies scan signals through a plurality of scan lines to the plurality of pixels. A data driving unit applies gray voltages through a plurality of data lines to the plurality of pixels in response to the scan signals. A signal controlling unit transfers a data control signal and an image data signal to the data driving unit. The signal controlling unit classifies, in accordance with a disparity of objects respectively included in a left-eye image and a right-eye image, an object depth in which an object is recognized by a user. The signal controlling unit resets a luminance of at least one of the left-eye image or the right-eye image corresponding to the object depth.