The standardized patient is a trained person that acts as a real–patient so that it is not recognizable by a professional expert. In this assimilation، standardized patient must act like a real patient not only in presenting biography، but also body movement، physical finding، feelings and personal characteristic Using of SP has some advantages than real-patient، accessibility in this way، medical students and residents can access to the standardized patient every where and every time and determined the problems on standardized criteria equally، also provide proper opportunity especially for beginner students in learning different clinical skills، at different time، beyond of any stress، as well as it eliminates major testing problem in residents and medical student’s clinical skill. In some cases SP has more educational value than real patient for learners in educational process. However SP prepare students very well to visit patients more effectively and evaluate student’s clinical skill but it doesn’t mean that we can eliminate real patient. SP is very important in medical education as well as lecture، book، video tape and real –patient.