The present invention provides an adhesive resin composition that has excellent adhesiveness and durability, a method for bonding adherends, and an adhesive resin film More specifically, the present invention relates to an adhesive resin composition containing more than 50 parts by mass and 99.5 parts by mass or less in a solid content of an acid-modified polyolefin resin having a melting point of 50 to 100° C., 0.5 parts by mass or more and less than 50 parts by mass in a solid content of an epoxy resin having a novolac structure, and an organic solvent; a method for bonding adherends including forming an adhesive layer on a first adherend by applying the adhesive resin composition and drying, and then bonding a second adherend to the adhesive layer by laminating the second adherend on the adhesive layer; and an adhesive resin film including a first adhesive layer, a substrate layer, and a second adhesive layer in that order, in which any one or both of the first adhesive layer and the second adhesive layer include(s) the adhesive resin composition.