Background: This aim of this study was to determine the relationship between medial meniscal tear and tibial translation in the anterior cruciate ligament (ACL)-intact knees. Methods: MRI of 278 patients, ages 18 to 50 yr, with medial meniscus posterior horn tears were evaluated. Two reviewers independently measured lateral and medial anterior tibial translation (ATT). Intraclass correlation coefficient (ICC) analysis was used to compare the results. Results: The ICC values of measurements of lateral ATT and medial ATT were 0.995 and 0.998, respectively; these values demonstrated almost perfect agreements. Age showed no significant difference between the control and patient groups (P>0.05). Lateral ATT values were lower in the patient group than those in the control group; however, there were no statistically significant differences between the groups (P=0.81). Medial ATT values were significantly lower in the patient groups than in the controls (P<0.05). Conclusions: Our results demonstrated significantly lower medial ATT values in patients with medial meniscus posterior horn tear in ACL-intact knees. However, most studies are dynamic and performed with ACL-ruptured knees or after meniscectomies in either ACL-intact or ACL-ruptured knees. Level of Evidence: Level III.