For the development of new material used bentonite in ceramic/organic material composite ABS(acrylonitrile-butadiene-styrene) material was used as a matrix polymer and a series of bentonite was blended together This bentonite, filler like talc or mica for plastic material was used since natural bentonite(Ca type) is easily obtainable in Korea, Na-bentonite changed from natural bentonite by Na₂CO₃ based on the specified compositions changes in the static and dynamic mechanical properties. It was discovered that the increased content of natural and Na- bentonite results in higher modulus with reduced impact strength. And Rockwell hardness was constant And Na- bentonite filled polymer showed improvement in impact strength and lower in modulus as the natural bentonite filled polymer. The storage modulus(E') of Na- bentonite filled ABS resin was higher than that of Ca- bentonite filled ABS resin, while higher temperature, storage modulus(E') decreased. At higher frequency, tan δ peak was shifted at high temperature.