The aim of this study is to evaluate the results of surgical treatment in a group of cerebral palsy patients with hip joint instability. This study includes 37 hips (16 dislocations and 21 subluxations) in 29 patients (8 bilateral and 21 unilateral) were treated by combined open reduction, acetabular, and femoral osteotomies; all in one stage. After a mean follow up of 4 years; 4 patients were able to discard using walking support; all the hips (except 2) were painless, most of the wheel chair confined patients were able to sit comfortably for a longer time with less sitting support but non of them were able to ambulate. Complications; 1 hip redislocation, 6 hips resubluxation, and 2 avascular necrosis. Conclusion: in cerebral palsy patients with hip subluxation or dislocation, combined open reduction, femoral osteotomy, and acetabular osteotomy is useful and justifiable method of management.