Tibio-talar dislocation that is not associated with fracture is a rare injury. In 1939, Wilson et al. reviewed fourteen cases and described two cases of their own. Since then, there have been few reports of limited experiences. The authors experienced two cases of posteromedial dislocation without fracture among 32 cases of ankle dislocation which were treated at department of Orthopedic Surgery, Yonsei Univeristy College of Medicine from April 1983 to May 1989.