Background: Patella is the sesamoid bone in the body to an integral part of the extensor mechanism of the knee joint. The functional outcome of patella fracture depends on age, severity of injury, treatment modality, anatomical reduction, restoration of articular congruity and postoperative rehabilitation. Aim of the study: to evaluate the functional status of the knee joint by allowing early knee movement after stable open reduction and internal fixation of fracture patella in 15 patients. Material and Method: This is a prospective study of 15 patients conducted in 250 bedded district hospital, Manikganj, over the period of 18 month (January 2016-july 2017. The age group involved in fracture patella was at over18 yrs. Road traffic accident (RTA) and injuries like fall in the slippery ground were the major causes of fracture. Open reduction and internal fixation was achieved by applying modified tension band wiring. Postoperatively (after 14 days of operation) when the pain was tolerable, assisted active movement of the knee was started, gradually passive and active movement of knee allowed and quadriceps exercise was continued. The functional status of the knee was assessed according to knee society score chart. 11 patients (73.32%) found satisfactory (Excellent and good). Conclusion: It has been revealed that early postoperative knee movement after open reduction and internal fixation of fracture patella can prevent stiffness of knee movement and shows better function.