A liquid crystal display device includes a liquid crystal display element,
a frame member having a frame-shaped part which is arranged at a
displaying surface side of the liquid crystal display element and having
a display window exposing a displaying surface of the liquid crystal
display element, and a side wall which is extended from the frame-shaped
part along a thickness direction of the liquid crystal display element. A
light source is arranged opposite to another surface of the liquid
crystal display element which is opposite to the displaying surface
thereof and irradiates the another surface of the liquid crystal display
element with illumination light. A housing member which houses the light
source has a main surface opposite to a frame-shaped part of the frame
member and a side wall formed at a periphery of the main surface thereof.