To provide a multilayer film that satisfies both flexibility and nerve, and is excellent in tear resistance by making it multilayers, and improved in lubricity by raising film surface roughness and can be suitably used as a base material film of a coating film surface protective film, and furthermore, a multilayer film that controls a decrease of adhesion by the bleed of a weather resistance agent, and the coating film surface protective film prepared by providing an adhesion layer to the multilayer film.

The are provided a base material film that is used for the coating film surface protective film, and a protective film that is provided by forming an adhesive layer to one side of the base material film. In the coating film surface protective film, an outer layer and an inner layer are layers each containing a resin mixture that mixes a propylene homopolymer (a1) at 70-90 mass% and low density polyethylene (a2) at 10-30 mass%, and an intermediate layer (B) is a layer that contains a propylene polymer (b1) at 15-40 mass% and linear low density polyethylene (b2) at 40-70 mass% to the whole mass of the intermediate layer (B).