A propylene-based resin composition comprising: the following component; the following component; the following component; and the following component, wherein based on a total weight of the component, the component and the component, taken as 100 parts by weight, a content of the component is 40 to 65 parts by weight, a content of the component is 10 to 25 parts by weight, a content of the component is 25 to 35 parts by weight, and a content of the component is 0.01 to 0.3 parts by weight: component: a propylene-based polymer; component: an ethylene-α-olefin copolymer; component: a talc whose ratio of an average particle size D50 as measured by a laser diffraction method to an average particle size D50 as measured by a centrifugal sedimentation method (D50 /D50) is at least 4; and component: 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; the following component; the following component; and the following component, wherein based on a total weight of the component, the component and the component, taken as 100 parts by weight, a content of the component is 40 to 65 parts by weight, a content of the component is 10 to 25 parts by weight, a content of the component is 25 to 35 parts by weight, and a content of the component is 0.01 to 0.3 parts by weight: component: a propylene-based polymer; component: an ethylene-α-olefin copolymer; component: a talc whose ratio of an average particle size D50 as measured by a laser diffraction method to an average particle size D50 as measured by a centrifugal sedimentation method (D50 /D50) is at least 4; and component: 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 propylene-based polymer; component: an ethylene-α-olefin copolymer; component: a talc whose ratio of an average particle size D50 as measured by a laser diffraction method to an average particle size D50 as measured by a centrifugal sedimentation method (D50 /D50) is at least 4; and component: 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.