There is provided a technology capable of reducing crosstalk at the time of 3D display in a display device using a liquid crystal lens that forms cylindrical lenses by controlling a voltage applied to a liquid crystal panel. The display device includes a liquid crystal display panel which includes a substrate including a plurality of strip-shaped transparent electrodes and a plurality of strip-shaped light shielding portions overlapping with the electrodes. The display device displays an image by switching a two-dimensional display and a three-dimensional display, and the cylindrical lenses making up a parallax barrier, are formed by controlling a refraction index of a liquid crystal layer.