Provided are a fastened composite and a method of fastening an adherend, which includes a friction material, to a coating object, comprising; forming on at least a part of a surface of the coating object a coated film with a curable resin-containing paint; and fastening the adherend to the surface of the coating object, by subjecting heating and/or irradiation of an active energy ray to the coated film, while making the adherend closely contact the coated film to press it by a predetermined pressure, to cure the coated film.