Suppurative arthritis of the hip joint is a rare disease in adult, but the disease is a serious condition to be left many complications. So the most important point in management of the suppurative arthritis of the hip joint is the early diagnosis and treatment. Recently we have experienced two cases of suppurative arthritis of the hip joint which was occurred in coma patients. Difficulties of the suppurative arthritis of the hip joint in coma patient are the detection and management. The supposed cause of the suppurative arthritis of the hip joint is probably a puncture of the repeatead femoral puncture.