To provide a front light of a liquid crystal display device, by which the contrast of the liquid crystal display device can be heightened by forming a reflection preventing film on the lower surface of a light guide plate to prevent the generation of whitening, in the light guide plate wherein a hologram is formed on the lower surface thereof and the hologram is used as a reflection surface.

The front light of the liquid crystal display device wherein the light guide plate consists of a light guide plate main body guiding and diffusing light from the end face opposed to a light source to the inner part and a film of a hologram polymer adhered to the lower surface of the light guide plate main body and which characteristically consists of a reflection surface downwardly reflecting light by the diffraction of light by the hologram, a protective film for protecting the film of the hologram polymer and the reflection preventing film disposed at the lower part of the protective film and preventing the reflection of light.