Introduction: The urostomy applies to any method allowing to derive the urine without physiological continence being maintained or extra-physiological continence system is created, in this case the flow of urine is permanent. It induces a real upheaval in the daily life of the patient with urostomy. Purpose: study the various complications of urostomy and to assess their impact on the patients quality of life. Material and Patients: We report a retrospective study spread over 3 years from February 2015 until February 2018, within the urology department at the Hospital Ibn Rochd of Casablanca , involving 70 patients who had a incontinent urinary diversion with the impact of ureterostomy on the quality of life through the Bladder Cancer Index questionnaire (BCI) that was established in the United States (USA) translated into French and validated then translated into Arabic. Results: Two types of external derivations have been recommended: Trans-ileal ureterostomy (Bricker): 60% of cases (42 patients) and cutaneous ureterostomy : 40% of cases (28 patients). The complications observed depended on the type of diversion and were distributed as follows: Trans-ileal ureterostomy: 4 cases of pyelo-ureteral stenosis + pyeloureteral dilation,1 case of releasing stitches of the intestinal anastomosis + peritonitis,2 cases of urolithiasis + lithiasis at the Bricker level,4 cases of pyelonephritis,1 case of peristomal hernia. Direct cutaneous ureterostomy: 1 case of ureterostomy necrosis, 1 case of probe migration, 2 cases of pyelonephritis. Regarding the impact of ureterostomy on the patient’s quality of life; we evaluated according to the BCI 3 domains: Urinary domain: preserved with a score of 82.55; Bowel domain: relatively conserved with score 86.Sexual domain: significantly impaired with score 42 and no activity at 64.3%. We note that 89% of our patients report a normal pursuit of social activities. 75% of patients accepted their stoma and 64% were autonomous for stoma care. For the 36%, the care was done by a relative or a health professional. Conclusion: The urostomy decision is a complex process that aims to provide the best possible quality of life for the patient depending on the context. The ideal derivation should preserve renal function and minimize morbidity.