Endoscopic anterior cruciate ligament reconstruction with one tunnel technique using central one-thirds of bone-patellar tendon-bone autografts were performed on 35 consecutive patients. 18 patients out of them were reviewed and evaluated with subjective and functional rating scales according to the Lysholm knee scoring system, physical examination and instrumented anterior laxity test. The average followup was 1 year and 6 months, ranging from 1 year and 4 months to 2 years and the average age at operation was 32 years old, ranging from 20 to 49 years old. At followup, the average Lysholm knee score was 86.4 compared to the average score of 48.1 prior to reconstruction. Physical examination and instrumented anterior laxity test showed that excellent anterior stability was regained in all patients but one who had a combined PCL insufficiency.There were no complication such as effusion of knee and infection. In summary, endoscopic ACL reconstruction with one tunnel technique using central 1/3 of bone-patellar tendon-bone seems to be a good procedure, which leaves less operative scar, takes short operation time when familiar with it and gives a constant good results, however longer period will be necessary to evaluate effectiveness of endoscopic ACL reconstruction with one tunnel technique.