A method to make a PTFE skived film capable of exhibiting, with a single layer, sliding properties, barrier properties with regard to a liquid contact surface, and excellent tear resistance during injection molding. This skived film is obtained by cutting a polytetrafluoroethylene block or a modified polytetrafluoroethylene block subjected to a thermal fusion treatment under reduced pressure or subjected to a pressurized thermal fusion treatment after being subjected to fusion under reduced pressure.