To prevent the deterioration of adhesive properties of a gas barrier membrane of a gas barrier polylactic acid resin molded object even in the case that an aqueous content is preserved for one to several months in a contact state from the gas barrier membrane side.

In the gas barrier polylactic acid resin molded object which is a gas barrier polylactic acid resin molded object having a container, a film or sheet shape and the gas barrier membrane formed on the surface of the polylactic acid resin molded object, the polylactic acid resin molded object is molded of a polylactic acid resin compounded with a resin composition which has an alkoxycarbonyl group (-COOR, R is alkyl group), a carboxyl group (-COOH) or both of them as additives, and keeps the resin composition exposed to the surface of the polylactic acid resin molded object.