PEIT(Polyethylene.co-Isosorbide Terephthalate), made from renewable corn-derived Isosorbide monomer, exhibits a wide range of glass transition temperature and is able to be used in many applications. We introduced MWCNT in order to improve thermal and mechanical properties of PEIT and give electric characteristic to PEIT. The thermal properties were investigated by DSC and TGA. The morphology, mechanical properties and electrical characteristic were performed by FE-SEM, UTM and surface resistance meter. As a result, we could find that the PEIT/MWCNT composites have high conductivity and good mechanical properties.