The hip joint is one of the largest and most stable joints in the body.The neck shaft angulation create a weak spot at the upper end of femur. The angulation constitutes important feature of adaptation that helps in the process of evolution of erect posture in bipeds.it was described as greater in males than females, or no sexual difference at all.Aim of the present study is to find out the correlation between Neck shaft angle of femur in relation with Gender/sex in Northern Rajasthan population. Subjects were selected from O.P.D Of Radiodiagnosis department, NIMS Medical college and Hospital, Jaipur, Rajasthan.Total number of subjects will be 100, among them 50 were male and 50 were female. Instrument for (Radiological) measurement of N.S.A is Radiant dicom viewer. Total population Right side mean neck shaft angle was higher than left side, but statistically not significant. Mean neck shaft angle in male subjects of the right side was higher while in females mean neck shaft angle of left side was more.The neck shaft angle is less in female than in the males due to the increased breadth of the lesser pelvis & greater obliquity of the femur