To provide a polymer film having ultraviolet absorbability in which high light resistance is shown.

The polymer film includes at least one kind of a compound expressed by Formula (I). In Formula (I), A1 and A2 each independently denote a group in which a Hammett substituent constant value σp is at least 0.2 or A1 and A2 are combined to form an annular active methylene compound structure; and X1 and X2 each independently denote a hydrogen atom, an aryl group, a heterocyclic group, a cyano group, an N-alkyl or arylcarbamoyl group, or an alkyl or aryloxycarbonyl group, or X1 and X2 are combined to form a saturated ring structure which makes a nitrogen atom and a carbon atom a ring structuring atom, and these groups or rings may have a substituent if possible.