This study evaluated the results of the resection angulation osteotomy in post-septic ankylosis of hip. We performed the procedure in 19 patients, with average age of 26 years (range, 21-32 years) and followed patients postoperatively for an average of 43 months (range 20-65 months). The osteotomy united in all patients with an average union time of 16 weeks (range 12-22 weeks). Average painless movement postoperatively was: flexion, 114 degrees; extension, 18 degrees; abduction, 35 degrees; adduction , 21 degrees; external rotation, 23 degrees; and internal rotation, 22 degrees. All the patients except one were able to sit crosslegged on the floor, offer prayers and use squat-type toilets. We conclude that this procedure is a good treatment option in patients with post-septic ankylosis of the hip, who need an alternative to more sophisticated procedures like total hip arthroplasty.