Surface protective film

A surface protective film includes a substrate film having formed on one surface thereof a coating film selected from the group consisting of (1) a coating film of a nonionic surfactant having a hydrophilic-lipophilic balance (HLB) of 13 or more, (2) a coating film of a surfactant comprising an ammonium salt of a fluorine based phosphoric acid ester, (3) a coating film of dimethyl silicone oil, and (4) a coating film of a mixture of a water-soluble urethane resin and dimethyl silicone. The surface protective film including a substrate film having a specific coating film formed on the outermost surface thereof is excellent in anti-staining property and ink adhesiveness. The substrate film preferably comprises a thermoplastic resin. The pressure-sensitive adhesive is preferably, for example, acrylic, urethane based, rubber based, or silicone based pressure-sensitive adhesives. Pressure-sensitive adhesives having high transparency are preferable, and acrylic pressure-sensitive adhesives are preferable from the standpoint of easiness of pressure-sensitive adhesive characteristics. Since the surface protective film is excellent in anti-staining property and ink adhesiveness, it can be suitably used for surface protection of polarizing plates, liquid crystal displays, plasma displays, etc.