We analyzed the functional results of urinary diversion in 21 patients who had a funneled ureteroileal anastomosis to avoid stricture and stenosis. No attempt was made to avoid reflux from the conduit to the ureter but special care was taken to construct a cutaneous stoma to prevent reflux from the appliance. The results of the procedure were satisfactory. No urinary leakage, or stricture of the ureters or ureteroileal anastomosis was observed in any patient and kidney function was preserved. One of the main advantages of this technique is simplicity in construction, which means increased safety when used by surgeons not extensively trained in urinary diversion operations.