A polyarylene sulfide resin composition, which comprises polyarylene sulfide (A) and polyamide (B) as essential components, and further comprises an organic phosphorus compound (C), which is selected from the group consisting of an aromatic phosphite compound and an aromatic phosphonate compound, and an inorganic phosphorus compound (D), which is selected from the group consisting from a metal salt of phosphorous acid and a metal salt of hypophosphoric acid, as essential components in addition to the polyarylene sulfide (A) and the polyamide (B).