The Shahr-e Babak right-lateral strike-slip fault along the N315 is one of the major factors of deformation in the Central Iran and Sanandaj-Sirjan structural zones, that its activity can be traced through surface studies, geological field measurements, aerial and satellite image interpretations. On the other hand, the effect of the fault structures in the depth should be investigated by other indirect studies, including aeromagnetic geophysical methods. In this research, we tried to investigate the depth effect of this large fault using aeromagnetic data and different filters. Two methods of analytical signal methods and depth estimation by Euler de-convolution method were used to investigate the magnetic anomalies in this study. According, the effect of this fault in detectable up to 4 to 6km depth and can be introduced as a basement fault.