BACKGROUND The anterior cruciate ligament (ACL) tear is the most common ligamentous injury to the knee joint. To reconstruct the tear in ACL the grafts and the fixation techniques used to vary with different surgeons. The commonest ones used are Quadruple Hamstring Tendon Graft (QHTG) and Bone Patellar Bone Tendon Graft (BPBT). The autografts using quadruple hamstring tendon is preferred by many surgeons. The functional outcome of the Quadruple Hamstring Tendon Graft is evaluated using Knee Injury and Osteoarthritis Outcome Score (KOOS Scoring system) etc. The anterior cruciate ligament repaired and reconstructed arthroscopically using the QHTG are included in this study. This study aims at the results and outcome of anterior cruciate ligament reconstruction (ACLR) using KOOS scoring system. The instrument used for the measurement should be standardized, sensitive to clinical change, concise and convenient for both the patients and the clinicians for evaluations. To enable data collection from patients speaking different languages and living in different cultures, questionnaires should undergo linguistic and cross-cultural translation processes and psychometric properties should be assessed in clinical studies. METHODS Study Design-Prospective observational study. Study Population-Patients with ACL injury with or without meniscal injury, attending Amala Institute of Medical Sciences and underwent arthroscopic ACLR, from January 2017-October 2017 were included in this study. The functional outcome of their knee surgeries was evaluated by following them up both pre-operatively and for 12 months post-operatively, till October 2018. Sample Size-A total number of 51 patients with ACL injury with or without meniscal injury who underwent ACLR. RESULTS No patients were lost during follow up. The data suggests good functional outcome according to the KOOS Scoring. At the end of one year, they showed significant improvement with the KOOS score, thus enabling them to return to near normal function. CONCLUSIONS It was found that arthroscopic ACLR using QHTG enabled the patients to achieve excellent knee function and stability. The complications in this procedure were minimal.