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This study reports characterization of polymer from Lanea coromandelica (houtt) merr which fabricated using solution casting methods. Investigation by scanning electron microscopy (SEM), Electron Dispersive X-Ray (EDX), FTIR, and impedance spectroscopy were done. We found that natural polymer based membrane polymer electrolyte contained metal ion such us silikon and aluminium. It was also found that electric conductivity was about 2 x 10-2 S/m3. We predicted that metal ion contained make the polymer electrolyte be conductive. It was predicted that its polymer was potential for electronic device application. On the other hand, the natural polymer also potential to change plastic application.