Knee osteoarthritis (OA) being the commonest joint disease has an incidence of 30% in population above 60 yrs. Proximal Fibular osteotomy (PFO) though in exploratory stage has aroused lot of interest in orthopedic surgeons as it seems to be most simple, affordable, safe surgery without any insertion of implants. A prospective study based on 30 knees with medial compartment knee osteoarthritis treated surgically in department of Orthopaedics for a period of 2 years. The data was collected using structured proforma, consent and functional outcome analysed based on Visual Analogue Score and American Knee Society Score. They were evaluated using Visual Analogue Score which was decreased from pre op 7.52 to post op 3.2 and American Knee Society Score which improved from pre op 44.9 to post op 74.1 where Good outcome was found in 23 knees (76.6%), excellent outcome was found in 3 knees (10%), fair outcome was observed in 4 knees (13.33%). Only 2 out of 30 knees had EHL weakness as complications which eventually recovered completely by end of 12 months