A ligneous decorative design part having a high degree of originality and excellent design, and exhibiting a novel handsome appearance, due to properties of a ligneous material which has translucency when impregnated with a resin material. The ligneous decorative design part has a surface layer portion including a ligneous sliced veneer which is impregnated with a resin material and disposed on a side of a front surface of the surface layer portion, and which defines a decorative design surface, and a base layer portion superposed on a back surface of the surface layer portion, and formed integrally with the surface layer portion. The surface layer portion has translucency, and the ligneous decorative design part further includes another material interposed between the surface layer portion and the base layer portion and which is visible on a side of the front surface of the surface layer portion.