A stereoscopic display device includes an inner polarizer, an outer polarizer, and a display substrate panel interposed between the inner and outer polarizers. The inner polarizer has first and second polarization regions arranged alternately and having a 90-degree polarization angle difference. The outer polarizer has third and fourth polarization regions corresponding in position to the first and second polarization regions. The third and first polarization regions have a 90-degree polarization angle difference. The fourth and second polarization regions have a 90-degree polarization angle difference. Light passing through the first polarization regions, the display substrate panel, and the third polarization regions can pass through one lens of a pair of stereoscopic glasses, whereas light passing through the second polarization regions, the display substrate panel, and the fourth polarization regions can pass through the other lens of the stereoscopic glasses.