Introduction: Hip bone is the form of the union of 3 bone ilium, ischium & pubis. The acetabulum is the part of hip bone it is usually a deep cup shape or house shoes shape. Acetabulum having a deep cavity like structure present in the lateral aspect of the hip bone. Acetabulum is divided into two parts articular and non-articular, non-articular part of this fossa is covered by a pad of fat this fat. this surface is articulate with head of the femur and it form most stable joint know as hip joint, this is the most stable joint in our body. Materials and Methods: The study was conducted in the Department of Anatomy.in R.K.D.F Meidical College & Hospital  Bhopal  M.P 200 human hip bones of both sexes were used. Following  parameter were taken Shape of acetabulum – Curved, angular, irregular straight. The transverse diameter of the acetabulum- The maximum distance between the anterior and posterior ends of the acetabular cavity. The vertical diameter of the acetabulum -The greatest dimension between the Upper and Lower Margins of the Acetabular Cavity Total diameter of the acetabulum – The transverse diameter of the acetabulum+.

Sex identification of human skeletal has great anthropological and medico legal significance. The hip bone is very useful and ideal for sex determination. It is the most trusted bone for sex determination because of its pattern of sexual dimorphism very common in human race. Present study parameters will be used for identification of sex. In present study significant difference will be observed in the distance between posterior inferior iliac spine and ischial spine which will be useful in anatomical, anthropological, archaeological and forensic studies. They always are want a reliable estimation of the sex of unknown individuals represented by only a few bones or when several bones are missing or are broken due to the effect of environmental conditions. There is the ability to determine sex from the unknown skeletal it is very important methods to do this. The various bones of the skeletal will able to tell sex of that human skeleton. From all bony structure pelvis is best indicator of sex. The Sexual dimorphism of hip bone showing it special feature in female due to child bearing property and this can be calculated by the coxal index and total pelvic height.