To provide a polylactic acid resin foamed sheet molded article which is be manufactured by a shortened molding cycle time, and which has practical heat resistance, excellent appearance, and excellent environmental suitability, and to provide the manufacturing method of the molded article in which the thermoforming of a polylactic acid resin is carried out by pinching it with a pair of molds, the deformation of a foamed sheet molded article is inhibited when releasing in carrying out the crystallization treatment, and too long shaping cycle time can be shortened. This polylactic acid resin foamed sheet molded article is obtained by carrying out the thermoforming of a crystalline polylactic acid resin foamed sheet, wherein the difference of the degrees of crystallinity between one split body and the other split body which are obtained by partitioning the molded article in the center section of the thickness of the molded article is 5% or more, the degree of crystallinity of one split body is >=25% and <=70% and the degree of crystallinity of the other split body is >=0% and <25%.