Determination or identification of sex of an unknown individual is the most important step in forensic science and archeology. The morphometrical analysis of the human pelvic bone is considered to be the hallmark for sex determination. Morphometrical analysis is the study and measurement of shape, size and structure of the pelvic bone in this case. In the present study a total of 24 dry human pelvic bones of known sex (12 male and 12 female) and without any gross abnormality were collected from the department of Anatomy, Saveetha Dental College, Chennai, India for evaluation. Sliding vernier calipers were used for measuring the iliac crest length and depth. All the data obtained were statistically tabulated using SPSS and represented graphically. The average value of the right sided male pelvic bone was 41.47mm and the left sided average value for males was 40.92mm. The average value of the left side and right side of the iliac crest was 42.97mm and 43.63mm. Respectively for the females With clear varying mean values of the male and female pelvic bones it is clear that the sex can determined using iliac crest of pelvic bone and serves as a reliable criteria