The purpose of the present invention is to provide an active-energy-ray-curable resin composition, an adhesive containing the resin composition, and a laminate film obtained using the adhesive, the active-energy-ray-curable resin composition having high adhesive strength to plastic films not easily adhered to, such as untreated PET film, fluorine-based films, and polycarbonate film, as well as to so-called non-easily adhesive films, and whereby adhesive strength can be maintained even in hot and humid conditions. The present invention is characterized in comprising as essential components: a (meth)acrylate compound (A) having a (meth)acryloyl group and polyester structural units in the molecular structure thereof, and a weight-average molecular weight (Mw) ranging from 5,000 to 30,000; a polyester resin (B) having an acid value ranging from 40 to 90 mgKOH/g; and a polymerization initiator (D).