Aims: The arthrodesis is a method of selection at a purulent destruction of a talocrural joint. By loss of motions the pain and the deformation are eliminated, capacity of a load of an extremities is restored. Methods: We allocate by experience of treatment 73 ill with a chronic infection of an ankle joint, which one executes in period with 1976 for 2002 an arthrodesis of a talocrural joint with applying of apparatus of external þxation. The external þxator consists of 2 rings on the anticnemion and 2 semirings on the foot. On the foot a pin was passed through talus, which provided maximum rigid of þxation and created conditions for early mobilization of a subtalar joint. At destruction of talus or distal metaphysis of a tibial is executed the autospongioid osteal plasty for 15 ill, which one has allowed to keep an axis of an extremity without shortening one. Results: The follow-up for 65 ill are studied in terms from 1 till 25 years. The osteal ankylosis is reached in 63 cases; the resistant remission of infected process is reached in 59 cases. Conclusions: Thus an arthrodesis of a ankle joint by the apparatus of external þxation enables to avoid the many-stage treatment, to reach an ankylosis in minimum terms and to restore function of an extremity.