Creating three dimensional dynamic human knee model and investigating the reasons of problems after surgical treatment are the subjects which has been studying by many investigators. The aim of the study was determining the primer structures which effect on passive movement on human knee joint. The tibio-femoral joint model was created by guidance of literature and then it is simulated by using ADAMS package. Some of the ligament bundles were seen to elongate negligibly. Therefore simulation was repeated by assuming these bundles as inextensible links. During the simulation contact points were traced. Contact forces were defined between the traces and tibial plateau and it was resimulated. As a result the anterior bundle of anterior, posterior cruciates and medial collateral ligaments (MCL) and deep portion of MCL played an important role on shaping the bones which form the knee joint. The ligament surgeries should be developed by considering the ligament bundle reconstructions to reduce the unwanted side effects after the surgery.