Using the magnetotelluric data surveyed in the Sabalan geothermal area, this study investigated the relationship between the extension of the impedance diagrams and the faults of the study area. Comparing the impedance diagrams at three different frequencies showed that at frequencies higher than 1 Hz, the earth's behavior is close to a one-dimensional media, and the elongation of the impedance diagrams is generally perpendicular to the faults observed on the surface. While at frequencies less than 1 Hz, the earth shows two-dimensional or three-dimensional behavior, and the extension of the diagrams is parallel to the north-south direction along the tensile faults of the Sablan range. Also, a two-dimensional inversion via a non-linear conjugate gradient method is implemented. A comparison between the estimated resistivity model and geological reports showed that the two observed faults in the resistivity model coincide with the faults observed on the earth's surface. Compared with the surrounding rocks, Resistivity significantly decreases between these faults. Therefore, perhaps these faults are feeding the geothermal reservoir. Besides, a relatively low resistivity zone extends between depths 500 to 2000 meters of the resistivity model. The zone coincides with the Valehzir Formation and the geothermal depth range in the reports of the wells in the Sablan area.