Abstract: In this research studies the effect of the addition of pistachio peel fillers on the unsaturated polyester matrix by the different weight ratio (0, 5, 10, 15, 20 wt.%) and study the electrical properties (dielectric constant, loss factor and electrical conductivity). The matrix mixed with each other using by the Hand lay-up method, the electrical properties were studies within arrange of frequencies (50-1 MHz) at room temperature. The electrical conductivity increase with boosting the weight ratio of pistachio peel fillers and increase with increase the voltage and frequency. The dielectric constant decrease with increased frequency and it increases with the increase pistachio peel filler. Loss factor (tanσ) and imaginary dielectric constant decrease with increase the frequency and increase with increase the weight ratio of pistachio peel fillers.