A propylene-based resin composition comprising: the following component (A); the following component (B); the following component (C); and the following component (D), wherein based on a total weight of the component (A), the component (B) and the component (C), taken as 100 parts by weight, a content of the component (A) is 40 to 65 parts by weight, a content of the component (B) is 10 to 25 parts by weight, a content of the component (C) is 25 to 35 parts by weight, and a content of the component (D) is 0.01 to 0.3 parts by weight: component (A): a propylene-based polymer; component (B): an ethylene-α-olefin copolymer; component (C): a talc whose ratio of an average particle size D50[L] as measured by a laser diffraction method to an average particle size D50[S] as measured by a centrifugal sedimentation method (D50[L]/D50[S]) is at least 4; and component (D): a nucleating agent represented by the following formula : wherein R 1 and R 2 each independently of each other represent an alkyl group having 1 to 8 carbon atoms or a halogen group, and m and n each independently of each other represent an integer of 1 to 5; when m is 2 or more, a plurality of R 1 present may be the same or different from each other; and when n is 2 or more, a plurality of R 2 present may be the same or different from each other. the following component (A); the following component (B); the following component (C); and the following component (D), wherein based on a total weight of the component (A), the component (B) and the component (C), taken as 100 parts by weight, a content of the component (A) is 40 to 65 parts by weight, a content of the component (B) is 10 to 25 parts by weight, a content of the component (C) is 25 to 35 parts by weight, and a content of the component (D) is 0.01 to 0.3 parts by weight: component (A): a propylene-based polymer; component (B): an ethylene-α-olefin copolymer; component (C): a talc whose ratio of an average particle size D50[L] as measured by a laser diffraction method to an average particle size D50[S] as measured by a centrifugal sedimentation method (D50[L]/D50[S]) is at least 4; and component (D): a nucleating agent represented by the following formula : wherein R 1 and R 2 each independently of each other represent an alkyl group having 1 to 8 carbon atoms or a halogen group, and m and n each independently of each other represent an integer of 1 to 5; when m is 2 or more, a plurality of R 1 present may be the same or different from each other; and when n is 2 or more, a plurality of R 2 present may be the same or different from each other. component (A): a propylene-based polymer; component (B): an ethylene-α-olefin copolymer; component (C): a talc whose ratio of an average particle size D50[L] as measured by a laser diffraction method to an average particle size D50[S] as measured by a centrifugal sedimentation method (D50[L]/D50[S]) is at least 4; and component (D): a nucleating agent represented by the following formula : wherein R 1 and R 2 each independently of each other represent an alkyl group having 1 to 8 carbon atoms or a halogen group, and m and n each independently of each other represent an integer of 1 to 5; when m is 2 or more, a plurality of R 1 present may be the same or different from each other; and when n is 2 or more, a plurality of R 2 present may be the same or different from each other. <EOS>