PURPOSE: To improve the embedding property of a dry film resist by providing a foaming layer expanded by heating on a resist layer.

CONSTITUTION: This dry film resist is provided with the foaming layer 10 and a release layer 11 between a base film 1 and the resist layer 2. The layer 10 is formed of a mixture composed of a soft acrylic resin as a base material and a foaming agent. A protective film 3 is first stripped, then the layer 2 side is superposed on an object and is press welded to the object by a heat roll. The foaming agent in the layer 10 is expanded by the heat applied at this time, by which the layer 2 is pressed to the surface of the object. The layer 2 is closely stuck to the surface of the object in follow up to the surface of the object.