The present invention is a stretchable film of a cured product of a resin including: a polymer compound having a urethane bond in the main chain, a repeating unit containing a fluorine atom, and a repeating unit containing a silicon atom. The present invention provides a stretchable film that has excellent stretchability and strength, with the film surface having excellent water repellency, and a method for forming the same.本發明之課題為提供具有優異的伸縮性及強度且膜表面之撥水性亦優異的伸縮性膜及其形成方法。該課題之解決方法為一種伸縮性膜，其特徵為：係含有高分子化合物之樹脂之硬化物，該高分子化合物具有含氟原子之重複單元、及含矽原子之重複單元，並且在主鏈具有胺甲酸酯鍵。
