A composite stretchable film comprising: a surface film which is a cured product of a polyurethane 1 containing a copolymer of one or more of units "a1", "a2", "a3", and "a4", each having polycarbonate or polyester and urethane bonds, and silicone-pendant type urethane units "b1" and/or "b2" represented by the following general formula; and an inner film which is a cured product of a polyurethane 2 containing a unit "c" having polyether and urethane bonds represented by the following general formula, on which the surface film is laminated: wherein, R 1 to R 4, and R 20 to R 27 represent the same or a different linear or branched alkylene group having 2 to 12 carbon atoms; R 5 represents a linear or branched alkylene group having 2 to 20 carbon atoms, or a divalent linking group containing an aromatic group, and optionally containing an ether group, a thiol group, an ester group, a sulfinyl group, a sulfonyl group, a carbonyl group, or a halogen atom; R 6, R 7, and R 8 represent the same or a different linear, branched, or cyclic alkyl group having 1 to 6 carbon atoms, a phenyl group, or a 3,3,3-trifluoropropyl group; R 9 represents the same or a different linear, branched, or cyclic alkyl group having 1 to 6 carbon atoms, a phenyl group, a 3,3,3-trifluoropropyl group, or a - (OSiR 6 R 7) s -OSiR 6 R 7 R 8 group; R 10 represents a hydrogen atom, or a linear or branched alkyl group having 1 to 4 carbon atoms; R 11 represents a single bond, a methylene group, or an ethylene group; R 12 represents a hydrogen atom or a methyl group; X represents a linear or branched alkylene group having 3 to 7 carbon atoms, and optionally containing an ether group; m, n, and p represent an integer of 1 to 200, and q, r, and s represent an integer of 0 to 20; and a1, a2, a3, a4, b1, b2, and c represent a ratio of the repeating unit satisfying inequalities 0≤a1≤1.0, 0≤a2<1.0, 0≤a3<1.0, 0≤a4<1.0, 0<a1+a2+a3+a4<1.0, 0≤b1<1.0, 0≤b2<1.0, and 0<b1+b2<1.0 in the polyurethane 1. a surface film which is a cured product of a polyurethane 1 containing a copolymer of one or more of units "a1", "a2", "a3", and "a4", each having polycarbonate or polyester and urethane bonds, and silicone-pendant type urethane units "b1" and/or "b2" represented by the following general formula; and an inner film which is a cured product of a polyurethane 2 containing a unit "c" having polyether and urethane bonds represented by the following general formula, on which the surface film is laminated: wherein, R 1 to R 4, and R 20 to R 27 represent the same or a different linear or branched alkylene group having 2 to 12 carbon atoms; R 5 represents a linear or branched alkylene group having 2 to 20 carbon atoms, or a divalent linking group containing an aromatic group, and optionally containing an ether group, a thiol group, an ester group, a sulfinyl group, a sulfonyl group, a carbonyl group, or a halogen atom; R 6, R 7, and R 8 represent the same or a different linear, branched, or cyclic alkyl group having 1 to 6 carbon atoms, a phenyl group, or a 3,3,3-trifluoropropyl group; R 9 represents the same or a different linear, branched, or cyclic alkyl group having 1 to 6 carbon atoms, a phenyl group, a 3,3,3-trifluoropropyl group, or a - (OSiR 6 R 7) s -OSiR 6 R 7 R 8 group; R 10 represents a hydrogen atom, or a linear or branched alkyl group having 1 to 4 carbon atoms; R 11 represents a single bond, a methylene group, or an ethylene group; R 12 represents a hydrogen atom or a methyl group; X represents a linear or branched alkylene group having 3 to 7 carbon atoms, and optionally containing an ether group; m, n, and p represent an integer of 1 to 200, and q, r, and s represent an integer of 0 to 20; and a1, a2, a3, a4, b1, b2, and c represent a ratio of the repeating unit satisfying inequalities 0≤a1≤1.0, 0≤a2<1.0, 0≤a3<1.0, 0≤a4<1.0, 0<a1+a2+a3+a4<1.0, 0≤b1<1.0, 0≤b2<1.0, and 0<b1+b2<1.0 in the polyurethane 1.