The present invention provides a liquid crystal display device capable of achieving natural and high-quality color display without reddish color shift, not only when viewed in the normal direction but also when viewed obliquely.A liquid crystal display device 1 of the present invention includes a light diffuser plate 3, a light source 2 disposed on the back side of the light diffuser plate 3, and a liquid crystal panel 30 disposed on the front side of the light diffuser plate 3, wherein the light diffuser plate 3 is constituted by dispersing light diffusing particles in a transparent material, and the absolute value of a difference .DELTA.n in the refractive index between the transparent material and the light diffusing particles and a 50% cumulative particle diameter D.sub.50 (.mu.m) of the light diffusing particles satisfy a relation 0.01.ltoreq..DELTA.n.times.D.sub.50.ltoreq.0.25 or 0.61.ltoreq..DELTA.n.times.D.sub.50.ltoreq.0.75.