The author describes a double osteotomy combining a pelvic (Salter) type of osteotomy and a periacetabular (Pemberton) type of osteotomy performed in one procedure by an anterior approach and aimed at a re-orientation of the acetabulum and a correction of any dysplasia. The technique is indicated in older children and adolescents when other procedures are not possible. However, this operation is not possible in cases where the circumference of the upper part of the acetabulum is smaller than that of the femoral head. It was applied in 30 hips with satisfactory results after a mean follow-up of one year.