<p>Disclosed is a fluorescent film containing an azobenzene derivative represented by the general formula (I) below and a binder. (In the general formula (I), R<SUP>1</SUP> represents a hydrogen atom or the like; Ar<SUP>1</SUP> and Ar<SUP>2</SUP> independently represent an optionally substituted arylene group or aromatic heterocyclic ring; X represents an alkylene group which may contain a heteroatom; X<SUP>1</SUP> represents -NH- or the like; Y represents a hydrogen atom or the like; a represents an integer of 0-2; m and n independently represent an integer of 1-8, and when m and n are integers of not less than 2, a plurality of Ar<SUP>1</SUP>'s and Ar<SUP>2</SUP>'s may be the same as or different from each other.)</p>
