The invention relates to a flame-retardant resin composition which comprises resin components with the following components (A), (B) and (C), and (D) a metal hydroxide; wherein (A) is 30 to 90 parts by weight of a thermoplastic polyurethane elastomer having a JIS hardness of A98 or below as determined according to JIS K 7311, (B) is 70 to 10 parts by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate unit content of 50 to 90wt%, (C)is 0 to 40 parts by weight of at least one polymer selected from the following copolymer (C1) to (C3): (C1) an ethylene-unsaturated carboxylic acid derivative copolymer modified by an acid anhydride, (C2) an epoxy-containing ethylene-olefin copolymer, and (C3) a styrene elastomer modified by an acid anhydride, the total amount of the components (A), (B) and (C) is considered as 100 parts by weight; the weight rate of the metal hydroxide is 40 to 250 parts by weight with respect to 100 parts by weight of the resin component consisting of the components (A), (B) and (C).