A projection type liquid crystal display device using liquid crystal display elements (3), which has a light source (1); illumination optics (2) having a function of irradiating a plane to be irradiated with light emitted by the light source (1); and liquid crystal display elements (3) modulating light; projection optics (4) for projecting light exiting from the liquid crystal display elements (3); wherein the illumination optics (2) include at least an elliptic mirror (5) and a spherical mirror (6), and the illumination optics (2) include further a first lens array (22) and a second lens array (23), in which a plurality of lenses are arranged perpendicularly to an optical axis, from the light source (1) side; and a condenser lens (7) for irradiating the liquid crystal display elements (3) with light after exit from the second lens array (23) with a high efficiency. In this way it is possible to realize a bright projection type liquid crystal display device having a small size and a good image quality performance.