Abstract: Anterior cruciate ligament is one of the main stabilizateur of the knee joint. Many methods were suggested for its reconstruction with different allo- and autografts, as well as synthetic materials. The aim of study is to compare of two methods of ACL reconstruction. Material and metods. The study included 110 patients who underwent ACL reconstruction. I group (54 patients) underwent single-bundle ACL reconstruction with hamstring tendons, II group (56 patients) underwent double-bundle reconstruction with lavsan (polyethylene terephtalate) tape. Patients were evaluated with Lachman, anterior drawer and pivot-shift tests and Lysholm score. Results. Our results showed better results in double-bundle group, especially rotational stability was significant better. Conclusion. Independing of the method of ACL reconstructions these surgeries must be perform taking into account anatomic features and changes of the knee. Doublebundle technique of ACL reconstruction with lavsan provides better stability than singlebundle technique with hamstring tendons.