To provide a polylactic acid composition which further improves the compatibility between polylactic acid and polypropylene, more enhances the impact resistance of a molded product to be obtained, furthermore inhibits hydrolysis under moist heat conditions, and can improve durability, its manufacturing method, and its molded product.

The polylactic acid composition is obtained by melt kneading a raw composition comprising polylactic acid of component (A), polypropylene of component (B), maleic anhydride modified noncrystalline polypropylene of component (C), an epoxy group-containing copolymer obtained by copolymerizing at least glycidyl methacrylate and ethylene of component (D), a copolymer of ethylene or propylene and a 3-8C -olefin of component (E), and a carbodiimide compound of component (F). The polylactic acid molded product is obtained by injection molding of this polylactic acid composition.