a backside covering member is used as a protective member for protecting back sides of solar cells of a solar battery and to provide moistureproof property and durability . the backside covering member includes an outer film , a moistureproof film formed on the outer film and formed of a base film and a coating layer of an inorganic oxide deposited on a surface of the base film , and a reflection layer formed on a surface of the moistureproof film opposite to a surface on which the outer film is laminated . ethylene - vinyl acetate copolymer adhesives are situated for sealing between the outer film and the moistureproof film and between the moistureproof film and the reflection layer .