PROBLEM TO BE SOLVED: To provide an adhesive agent layer for optical film having excellent heat resistance and durability used for laminating optical films incorporated in an image display device, an adhesive film for optical film and an adhesive agent composition for optical film.SOLUTION: There is provided an adhesive agent layer for optical film by crosslinking an acrylic polymer consisting of a copolymer having Tg of -60 degrees centigrade to -30 degrees centigrade by copolymerizing 100 parts by weight of total of at least 2 or more kinds of monomers selected from monomer group consisting of an alkyl (meth)acrylate monomer, a (meth)acrylate monomer having an aromatic group and a nitrogen-containing vinyl monomer, 0.1 to 10.0 parts by weight of a copolymerizable vinyl monomer containing a carboxyl group and 0.05 to 4.5 parts by weight of a copolymerizable vinyl monomer containing a hydroxyl group.SELECTED DRAWING: None

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