The authors report the results of 63 internal urethrotomies for urethral stenosis performed during a four year period. The essential sites were perineal and the most frequent aetiology iatrogenic, particularly after prostatectomy. Overall, the authors obtained 18 satisfactory results, 2 severe complications, 24 failures and 17 patients are too recent to assess or were lost from sight. A second endoscopic urethrotomy gave only very little chance of a definitive recovery. Although the results were not constantly excellent, the series studied by the authors shows that endoscopic internal urethrotomy offers the possibility by a simple technique of obtaining a certain number of durable successes whilst not interfering with the subsequent performance of other types of urethroplasty. Finally, in a certain number of cases endoscopic internal urethrotomy facilitates subsequent dilatations.