The present invention provides an adhesive resin layer and an adhesive resin film which can prevent generation of air bubbles even when they are thermally deformed after adhering to a substrate, and have good followability to deformation of a substrate of a laminate in which a substrate, an adhesive resin layer, and a substrate are laminated in an order. More particularly, the present invention is a monolayered adhesive resin layer 11 comprising an acrylic-based adhesive resin composition, wherein the adhesive resin composition contains at least (A) an acrylic-based polymer, (B) an acrylic-based monomer or an acrylic-based oligomer, and (C) a thermopolymerization initiator, the adhesive resin layer 11 has pressure sensitive adhesiveness on both surfaces 11a, 11b at an ambient temperature, and in differential scanning calorimetry (DSC) at a temperature raising rate of 10°C/min, heat generation is observed at 80°C or higher, and at least one peak is confirmed between 120°C and 210°C.