A multilayer film comprising an upper layer (A), at least one intermediate layer (B), and a lower layer (C) stacked in that order, wherein the intermediate layer (B) comprises a composition (b1) or a composition (b2) below, and the upper layer (A) and the lower layer (C) each independently comprise an ethylene polymer and/or a propylene polymer：Composition (b1)：a composition that comprisesa propylene polymer (p1) having a melting point in the range of 140 to 165℃ measured by differential scanning calorimetry and a melt flow rate (MFR；ASTM D 1238, 230℃, 2.16kg load) in the range of 0.1 to 20 g/10min, a propylene‧α-olefin random copolymer (r1) having a molecular weight distribution in the range of 1.0 to 3.5 determined by gel permeation chromatography (GPC) and a melting point in the range of 90 to 125℃ measured by differential scanning calorimetry, and 30% by weight to 60% by weight of an ethylene-based elastomer (where the sum of the contents of the propylene polymer (p1), the propylene‧α-olefin random copolymer(r1), and the ethylene-based elastomer is 100% by weight)(when the intermediate layer (B) is composed of the composition (b1), the ratio of the content of the propylene polymer (p1) in the entire multilayer film to the sum of the contents of the propylene polymer (p1) and the propylene‧α-olefin random copolymer (r1) in the entire multilayer film is 0.1 to 0.35).本發明係提供依序積層上部層(A)、1個以上之中間層(B)、及下部層(C)而成的多層薄膜，其特徵為，上述中間層(B)係由下述組成物(b1)或組成物(b2)所構成，上述上部層(A)及上述下部層(C)分別獨立含有乙烯聚合體及/或丙烯聚合體而成。組成物(b1)係含有以下成分之組成物：以示差掃描熱量測定所得之熔點為140~165℃之範圍，熔融流動速率(MFR；ASTM D 1238，230℃，2.16公斤負重)為0.1~20克/分鐘之範圍的丙烯聚合體(p1)；以凝膠滲透色層分析(GPC)測定之分子量分佈為1.0~3.5之範圍，以示差掃描熱量測定所得之熔點為90~125℃之範圍的丙烯‧α-烯烴無規共聚合體(r1)；以及乙烯系彈性體30重量%~60重量%(其中，丙烯聚合體(p1)、丙烯‧α-烯烴無規共聚合體(r1)及乙烯系彈性體之配合量之和為100重量%)。(其中，中間層(B)為組成物(b1)之情況，相對於多層薄膜整體之上述丙烯聚合體(p1)與上述丙烯‧α-烯烴無規共聚合體(r1)之配合量之和，多層薄膜整體之上述丙烯聚合體(p1)的配合量之比為0.1~0.35。)
