A stereoscopic display device is disclosed. The stereoscopic display device includes a backlight module, a first liquid crystal display panel, a first polarizer, a second liquid crystal display panel, a second polarizer, and a detachable polarizer. The backlight module has a light emitting side. The first polarizer, the first liquid crystal display panel, the detachable polarizer, the second liquid crystal display panel, and the second polarizer are disposed sequentially from the light emitting side. The detachable polarizer is detachably inserted. By designing arrangements of the first polarizer, the second polarizer, and the detachable polarizer, and by limiting the pixel scale relationship between the first liquid crystal display panel and the second liquid crystal display panel, various types of stereoscopic display technologies can be implemented according to the present invention.