A polyester film composite material comprising a biaxially oriented
polyester film having a thickness of 5 at least 50 gm but not more than
200 gm and an easy-adhesion coating applied onto one or each surface
thereof, and having a haze value of less than 2% and a total light
transmissivity of at least 90%, and a light-diffusing plate comprising a
light-diffusing layer 10 laminated on the surface of the easy-adhesion
coating thereof. According to the present invention, a light-diffusing
plate having excellent optical properties when used in a liquid crystal
display and a substrate 15 therefor are provided.
