A young man 21 years old with prognathic mandible and disharmony in dental and skeletal, is treated by orthodonsics and orthognathic surgery. Eleven month after orthodonsic treatment, osteotomi subsigmoid is done. The oblique cutting line in both ramus mandible is operated via intra oral approach. After 8 weeks post operative, finishing treatment in orthodonsics is performed. Panoramic and cephalometric post operative and one year after are shown that mandible is in good position and no relaps evidence.