Recently the interest in minimal invasive surgery for total hip arthroplasty is increasing due to its advantages of less soft tissue injury, less postoperative pain, early rehabilitation and cosmesis. There are two methods of minimal invasive surgery for total hip arthroplasty; one incision and two incision technique. The more common method is the one incision technique and among them, anterolateral and posterior or posterlateral method are most common. This one incision method reduces the length of incision. Two incision method was developed by Mears and Berger to reduce the degree of trauma to the muscles and tendons as well as to reduce the incision size. But the minimal invasive total hip arthroplasty has some potency of development of complications due to smaller operation field. So the minimal invasive total hip arthroplasty should be done only by experienced surgeons with sufficient training and adequate equiments.