A polyamide resin composition comprising: a polyamide resin; an aluminic acid alkali metal salt; and at least one or more compounds selected from the group consisting of the following to: a salt of one or more metal elements selected from the group consisting of groups 3, 4, 11, 13, and 14 of a periodic table; at least one organic heat stabilizer selected from the group consisting of a hindered phenol compound, a hindered amine compound, and an organic phosphorus compound; and a crystalline thermoplastic resin having a lower melting point than that of the component and/or an amorphous thermoplastic resin having a lower Vicat softening point than that of the component, and wherein a content of the component is 0.5 to 20 parts by mass with respect to 100 parts by mass in total of the component and the component, and the components to have the following respective contents when selected as a component contained therein: component: 0.001 to 0.05 parts by mass in terms of an amount of the metal element in with respect to 100 parts by mass in total of the component and the component; component: 0.8 to 20 parts by mass with respect to 100 parts by mass in total of the component and the component; and component: 1 to 50 parts by mass with respect to 100 parts by mass in total of the component and the component. a polyamide resin; an aluminic acid alkali metal salt; and at least one or more compounds selected from the group consisting of the following to: a salt of one or more metal elements selected from the group consisting of groups 3, 4, 11, 13, and 14 of a periodic table; at least one organic heat stabilizer selected from the group consisting of a hindered phenol compound, a hindered amine compound, and an organic phosphorus compound; and a crystalline thermoplastic resin having a lower melting point than that of the component and/or an amorphous thermoplastic resin having a lower Vicat softening point than that of the component, and wherein a content of the component is 0.5 to 20 parts by mass with respect to 100 parts by mass in total of the component and the component, and the components to have the following respective contents when selected as a component contained therein: component: 0.001 to 0.05 parts by mass in terms of an amount of the metal element in with respect to 100 parts by mass in total of the component and the component; component: 0.8 to 20 parts by mass with respect to 100 parts by mass in total of the component and the component; and component: 1 to 50 parts by mass with respect to 100 parts by mass in total of the component and the component. a salt of one or more metal elements selected from the group consisting of groups 3, 4, 11, 13, and 14 of a periodic table; at least one organic heat stabilizer selected from the group consisting of a hindered phenol compound, a hindered amine compound, and an organic phosphorus compound; and a crystalline thermoplastic resin having a lower melting point than that of the component and/or an amorphous thermoplastic resin having a lower Vicat softening point than that of the component, and component: 0.001 to 0.05 parts by mass in terms of an amount of the metal element in with respect to 100 parts by mass in total of the component and the component; component: 0.8 to 20 parts by mass with respect to 100 parts by mass in total of the component and the component; and component: 1 to 50 parts by mass with respect to 100 parts by mass in total of the component and the component.