A 62 year old diabetic male presented to us with sudden onset severe pain in left knee while getting up from floor. He was already under treatment for early osteoarthritis knee. Now, there was sudden swelling around knee region with ecchymosis, inability to actively extend left knee and palpable gap just above the patella. X ray and mri confirmed there was complete tear of quadriceps tendon near its insertion on patella. Patient was kept in knee brace for 5 days to allow the swelling to decrease. Plan for repair was made. Anterior midline incision was used and torn tendon exposed. The tendon end s showed degeneration with no significant remnant attached to patella. The ruptured end was debrided and woven with a strong non absorbable suture. Tunnels were drilled trough patella longitudinally. A high speed burr was used to make a trough in proximal part of patella to allow the seating of quadriceps tendon. The tendon end was then tightened to the patella. The knee was moved through its entire range and strength of repair checked. Wound was closed in layers and knee brace was given. Weight bearing was allowed next post op day in knee brace. Knee bending passively was started after 2 weeks and actively after 6 weeks.