The long-term results of surgery for post-traumatic strictures of the posterior urethra by means of surgical invagination are presented. The most frequent complications and their management are discussed. Convalescence was uneventful in 47.76 per cent of the patients. Analysis of particular parameters, such as the width of the urinary stream, ability of retain the urine and urethrographic evaluation, revealed good results in 83.5, 67.15 and 76.11 per cent of the patients, respectively. The method of invagination as modified by Michalowski and Modelski is one of the most efficient for posterior urethral stricture repair.