Abstract: An electromagnetic wave shield material composition and an electromagnetic wave shield product including such material composition are disclosed, which may be used on an electric or electronic device such as a portable telephone so as to attenuate or shield any electromagnetic waves generated therefrom. Specifically, the electromagnetic wave shield material composition comprises a primary element including a mixture composed of 10 to 90% by weight of silicon resin and 90 to 10% by weight of baked ceramics material, and a secondary element including a mixture composed of aluminum powder and stainless metal powder. Alternatively, the secondary element may include a mixture composed of paint, aluminum powder and/or stainless metal powder. The electromagnetic wave shield product has the form of a thin sheet of 0.5 mm to 2.0 mm thick, formed by shaping the above material composition such as by press. Alternatively, the thin sheet may have an additional thin aluminum film layer deposited on one side thereof.