An optical film, which contains a cellulose acylate, at least one compound
of formula (I) in an amount of 0.01 to 20 mass parts, and at least one
cyclic compound having at least three substituents in an amount of 0.01
to 20 mass parts, to 100 mass parts of the cellulose acylate:
##STR00001## wherein R.sup.1 to R.sup.7, R.sup.9 and R.sup.10 each
independently is a hydrogen atom or a substituent; at least one of
R.sup.1 to R.sup.5 is an electron-donating group; R.sup.8 is a hydrogen
atom, an alkyl group, an alkenyl group, an alkinyl group, an aryl group,
an alkoxy group, an aryloxy group, an alkoxycarbonyl group, an acylamino
group, an alkylcarbonyloxy group, a cyano group, or a halogen atom; and
an optical compensation sheet, a polarizing plate, and a liquid crystal
display device, each of which uses the optical film.