Background: The fixation technique in treating idiopathic scoliosis ranged from either posterior fixation, anterior approach, or combined anterior and posterior approach. Objective: Assessing the short–term outcome of pedicle-screw method in treating adolescent idiopathic scoliosis (AIS). Patients and Methods: Twenty consecutive patients were prospectively included with minimum of 6-months follow-up. The average age of surgery ranged between 11 and 18 years, with a mean age of 15.25 ± 2.24 years. Radiographic and clinical measurements were assessed at preoperative (preop), postoperative (PO), and final follow-up (FFU) period for curve correction rate, correction loss rate, and complications. Results: The average main thoracic curve was corrected from 69.80 ± 21.0° preop to 17.73 ± 7.38° postop. This revealed a rate of 74.56 ± 7.32% correction. The average thoracolumbar curve was corrected from 52.14 ± 20° preop to 15.36 ± 10.53° postop, with a rate of 66.87 ± 24.81 % correction. Conclusion: All-screw method was an efficient and safe method.