Introduction & Background: The harmful effects of x-rays on sensitive cells such as those of sex gonads are a well-established fact. Therefore, special care should be taken in HIP radiographies to protect the gonads. According to the most recent references, to locate the head of femur and its JOINT in HIP radiographies, a line should be drawn from the ASIS to syphilis pubis. To locate the head of the JOINT, we had to move 2.5cm inferior and laterally from the middle of the men-tined line. The outer end of this new line indicates the position of the femur head. However, due to the lack of accurate instruments in wards and the variety of diseases and also to avoid repetitive HIP radiographies, we decided to apply an experimental method. Patients & Methods: In this study, HIP radiographies with FFD=100 were done for 50 patients of both sex with different ages. In all instances the distances be-teen syphilis pubis and the greater truanted, the base of the lesser truanted, and upper edge of acetabulum, and syphilis pubis and the center of femur, were measured on the radiographs by means of a standard ruler. The findings were then statistically analyzed. The radiography apparatus was Phil-lips 500MA model D7. Results: In this study, it was shown that in 27 cases, the distance between syphilis pubis and the center of the head of femur was equal to the distance be-teen the base of the lesser truanted and the upper edge of acetabulum. There was also a difference of 0.5, 1, and 2.5 centimeters in 14, 10, and 3 cases re-spectively. Conclusion: These findings were statistically signify-cant and new. This is notable with regard to the ease of locating the HIP JOINT in small radiographs. In addition it has the advantage of a small degree of gonad protection.