To provide an optical film capable of uniform polarization change in a wide wavelength range.

The optical film is obtained by forming a film with a composition containing a compound represented by the formula (D) wherein R17 is hydrogen or a methyl group, R18 is an atomic group having at least one 6-20C aromatic group, Y is a 1-6C alkylene group or a 2-6C alkyleneoxy group which may be substituted by a hydroxyl group, an oxo group, a 1-12C alkyl group, a 1-12C alkoxy group, a 6-12C aryl group, a 7-12C aralkyl group, a glycidiloxy group, a 2-4C acyl group or a halogen atom, m is an integer of 1-6, and a plural Ys may be same or different when m is not less than 2, and thereafter is further stretched.