OBJECTIVES: The literature does not show any studies that correlate between the morphological parameters of knee and functional outcome after anterior cruciate ligament reconstruction. The purpose of this study was to establish a correlation of morphological parameters of the knee in (magnetic resonance imaging) MRI with functional outcome in patients who underwent anterior cruciate ligament reconstruction. MATERIAL AND METHODS: This was an observational study which included 63 patients who underwent anterior cruciate ligament reconstruction. Morphological parameters such as notch width index, medial and lateral tibial slopes and patellar tendon tibial slope angle were interpreted. Functional outcome was measured using IKDC (International knee documentation committee) score and Tegnor-Lysholm scores at 3, 6, 9 and 12 months post operatively. RESULTS: Group 1(NWI) had least IKDC score (77.5 ± 8.5) and Tegnor-Lysholm score (79 ± 3) at 12 months among patients when compared with other single abnormal morphological parametric values. Group 10 (NWI + PTTS) had least IKDC scores (79 ± 2) and Tegnor-Lysholm scores (91) at 12 months. Overall group 15 (LTS + PTTS) had better IKDC scores (85.3 ± 0.94) and Tegnor-Lysholm scores (93.3 ± 2.4) at 12 months among all the other groups considered. Thirty patients had abnormal notch width index. CONCLUSION: Evaluation of knee morphology is important in anterior cruciate ligament injuries as the relevant indices correlate with surgical outcome and helps the surgeon to choose an approach to minimize graft failure. Notch width index is the best of these indices to assess the future likely functional outcome in patients with anterior cruciate ligament reconstruction. Patients having a narrow intercondylar notch width index are at risk of having a poor functional outcome post anterior cruciate ligament reconstruction.