An ethylene-vinyl alcohol copolymer composition which contains an ethylene-vinyl alcohol copolymer and an iron compound, and wherein the content of the iron compound in terms of elemental metal is 0.01-100 ppm relative to the weight of the ethylene-vinyl alcohol copolymer composition. Consequently, an ethylene-vinyl alcohol copolymer composition having excellent ultraviolet absorbing capability is able to be obtained according to the present invention.一種乙烯－乙烯醇系共聚物組成物，含有乙烯－乙烯醇系共聚物與鐵化合物，其特徵為：該鐵化合物之含量就該乙烯－乙烯醇系共聚物組成物之單位重量以金屬換算計係為0.01~100ppm。是以，得到紫外線吸收能力優異的乙烯－乙烯醇系共聚物組成物。
