Composites of polyaniline-polyethylene-copper were prepared using different weight percentage of nano copper particles of 100 nm size. X-ray diffraction and Fourier transform infrared spectroscopy were done to identify the crystal structure of prepared polyaniline and polyaniline-polyethylene-Cu, respectively. Electrical properties for all the combinations of 5, 10, 15, 20, and 25 wt% copper were examined as electrical conductivity, capacitance, and dielectrical constant. The remarkable improvement in all the electrical properties were indicated after adding nano copper particles, accept the combination P-Ani-5 wt% Cu. Scanning electron microscopy results confirm the dispersion of nano copper particles through their microstructure.