A support film for a tape includes a film-shaped support formed of polyurethane, a barrier layer which includes aromatic isocyanate-based polyurethane and a layered inorganic compound, the barrier layer being formed on a surface of the support, and an overcoat layer including polyvinyl alcohol and an organic metal chelating agent.一種貼布材料用支撐薄膜，其係具備：由聚胺基甲酸酯所構成之薄膜狀的支撐體、含有芳香族異氰酸酯系聚胺基甲酸酯與層狀無機化合物且形成在前述支撐體之一側的面的障蔽層、及含有聚乙烯醇或乙烯-乙烯醇共聚物與有機金屬螯合物劑的保護層。
