A film for tape material includesa film basemember made of polyurethane, a barrier layer which includespoly(vinyl)alcohol and layered inorganic compoundsand is formed on one side of the film basemember, an under coating layer which is provided between the film base member and the barrier layer and the under coating layer allows the film base member to adhere to the barrier layer.一種用於貼布材料之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;含有聚乙烯醇與層狀無機化合物、形成在前述支撐體之一側面的障蔽層;設置在前述支撐體與前述障蔽層之間、使前述支撐體及前述障蔽層密合的底塗層。