Background: The present study was conducted for evaluating functional outcomes of proximal fibular osteotomy in osteoarthritis knee. Materials & methods: A total of 20 patients were assessed. Knee pain was assessed using a Visual analogue scale. Medical joint space and the hip knee-ankle angle was measured. based on the whole lower extremity radiograph. Results: Mean age of the patients was 48.3 years. Mean VAS improved significantly from preoperative value of 8.53 to 2.8 at 8 months postoperative follow-up. Significant improvement was observed in the Mean knee joint space from preoperative value of 0.29 to 0.61 at 8 months postoperative follow-up. Significant improvement was observed in the mean hip knee ankle angle from preoperative value of 188.3 to 174.2 at 8 months postoperative follow-up. Conclusion: For managing medical compartment arthritis of knee, PFO is a novel alternative method.