The structure and electrical properties of double perovskite Sr2FeTiO6 have been studied. Sr2FeTiO6 were prepared by sol-gel method results in powder form. Then, the powder was pressed and sintered at 1100 °C to form pellet. The structural features of the systems have been studied using X-Ray Diffraction (XRD), Scanning Electron Micrograph (SEM) and Energy Dispersive Spectroscopy (EDS). Through XRD characterization, the structure of the compound is single phase cubic Perovskite (space group Pm3m) with lattice parameter a = 3,899 Å and crystallite size is 26 nm. The electrical properties of the material, as functions of temperature (293 K - 523 K) and frequency (100 Hz - 1 MHz), were examined by Impedance Spectroscopy method using RLC meter. The imaginary of impedance (Zim) data shows the peaks which indicates the presence of relaxation process in this sample. Activation energy for relaxation process which is evaluated by Arrhenius Law indicates the type of charge carrier is p-type polaron.