NOVELTY - A solar cell sealing material comprises 0.001-1 part weight of sulfur-type antioxidant (I) with respect to 100 parts weight of ethylene-( alpha )-olefin copolymer having Shore A hardness of 60-85 measured based on ASTM D2240, and melt flow rate of 10-50 g/10 minutes at 190 degrees C under load of 2.16 kg, measured based on ASTM D1238.    USE - Sealing material is used for solar cell module (claimed) used as power supply for motor vehicle battery, and used in outdoors e.g. roof of buildings and camp.    ADVANTAGE - The sealing material has excellent transparency, flexibility, adhesiveness, heat resistance, electrical property, crosslinking characteristics and extrusion molding property. The solar cell module using the sealing material has reduced deformation even during high temperature, and excellent external appearance productivity, electric power generation efficiency and durability, and is economical.    DETAILED DESCRIPTION - A solar cell sealing material comprises 0.001-1 part weight of sulfur-type antioxidant of formula: R1-S-R2 (I) with respect to 100 parts weight of ethylene-( alpha )-olefin copolymer having Shore A hardness of 60-85 measured based on ASTM D2240, and melt flow rate of 10-50 g/10 minutes at 190 degrees C under load of 2.16 kg, measured based on ASTM D1238.    R1=allyl, phenyl, phenol, imidazole, triazyl, hydroxy or metal carboxylate;and    R2=H, alkyl, alkenyl, allyl, phenyl, phenol, imidazole, triazyl, hydroxy or metal carboxylate.    INDEPENDENT CLAIMS are included for the following:    (1) manufacture of solar cell sealing material, which involves molding the ethylene resin composition containing ethylene-( alpha )-olefin copolymer by melt-extrusion molding process in sheet form; and    (2) solar cell module, which has a surface side transparent protection component, back surface side protection component, solar cell element, and sealing layer which is obtained by crosslinking the solar cell sealing material. The sealing layer seals the solar cell element between the surface-side transparent protection component and back surface side protection component.