A 12 years old female presented with class II division I malocclusion with skeletal disorder (ANB 6°), deep bite, posterior crossbite 26, prostrusive of anterior maxillary constriction, retrognatic of mandible and mild crowding of upper and lower jaws. The treatment of choice was twin block appliance for modifying the jaw development, and then followed by fixed orthodontics. After eight months, the progression of treatment was a better facial profile.