The present invention is a stretchable film composition including: a silicone main-chain type urethane having a structure shown by the following general formula (1)-1 and/or (1)-2, and a silicone-pendant type urethane having a structure shown by the following general formula (2)-1 and/or (2)-2. The present invention provides a stretchable film composition that has excellent stretchability and strength, with the film surface having excellent water repellency, and is favorably used for a non-tackiness stretchable film, a stretchable film using the stretchable film composition, and a method for forming the same.本發明提供有優良的伸縮性及強度且膜表面之撥水性優異、非黏質的伸縮性膜中適合使用的伸縮性膜材料組成物、使用了該伸縮性膜材料組成物之伸縮性膜、 及其形成方法。一種伸縮性膜材料組成物，含有具下列通式(1)-1及/或(1)-2表示之結構之聚矽氧主鏈型胺甲酸酯及具下列通式(2)-1及/或(2)-2表示之結構之聚矽氧懸吊型胺甲酸酯。
