An LC barrier panel of a stereoscopic image display device has a substrate on which first barrier pixels and second barrier pixels are alternately arranged in a vertical direction and on which the first barrier pixels and third barrier pixels are alternately arranged in a horizontal direction. On a counter substrate, a counter electrode is formed to cover the entire surface of the display region. The third barrier pixels and the counter electrode are supplied with the same drive signal while an effective voltage is applied between the counter electrode and the first and second barrier pixels to perform vertical stripe display. Alternatively, the second barrier pixels and the counter electrode are supplied with the same drive signal while an effective voltage is applied between the counter electrode and the first and third barrier pixels to perform horizontal stripe display.