A review was made of 15 cases of septic arthritis in children. 13 of these cases corresponded to purulent arthritis, one to tuberculous arthritis and one to brucellar arthritis. All of them received diagnostic punction. Five joints received arthrotomy, by a washed-aspiration system. The antibiotic treatment was given approximately during for six weeks. We had two complications, die to a delayed diagnosis: one coxa valga and one capital femoral necrosis. It is important the insist on a early diagnosis and decompressive arthrotomy, specially in those cases in which the hip is the joint affected.