The purpose of this paper is to present the focal mechanism of earthquakes, in south eastern part of Zagros. In this investigation all earthquakes greater than 4.5 magnitude from 1977 to 2007 were studied.Information of these earthquakes are collected from the Harvard university website (Harvard Centroeid Moment Tensor). On the basis of the primary p-wave polarity, focal mechanisms of earthquakes and main stress axis (T and P), nodal planes were determined.The Focal software has used for determination of the earthquake's focal mechanism. This software determines the primary stress axis (T and P) and nodal planes.Focal mechanisms show that the most earthquake faults in the studied area have compressional or main compressional component and in some cases strike slip component.