The invention relates to a fluorine-containing compound containing a substituent represented by the formula 1: ##STR00001## where R.sup.1 is (a) a straight-chain alkylene group, (b) a branched alkylene group, (c) a cyclic structure containing an aromatic ring group or aliphatic cyclic group, or (d) a substituent containing an aromatic ring group and an aliphatic cyclic group, and R.sup.1 optionally contains fluorine, another halogen, CN, oxygen, nitrogen, silicon, or alcohol, and R.sup.2 is a hydrogen atom, a straight-chain or branched alkyl group, an aromatic group, or a hydrocarbon group optionally containing an aliphatic cyclic group, and R.sup.2 optionally contains fluorine, oxygen, nitrogen, carbonyl bond, or alcohol, and a plural number of R.sup.2 having different structures are optionally contained in the molecule.