Since October 1994 we performed endoscopic treatment of bladder diverticula, in combination with the resolution of cervico-urethral obstruction, in 12 patients. In a first group of five patients we used the incision of the diverticular neck, while in a second group of seven patients we associated the electrocoagulation of the diverticular mucosa to the opening of the diverticular neck. The better results have been obtained in the second group of patients in which the diverticula had markedly shrunk in two cases and had totally disappeared in five. Transurethral treatment of bladder diverticula, with incision of the diverticular neck and the fulguration of the diverticular mucosa, combined with transurethral operations for removing the obstruction of the lower urinary tract, is a safe, fast and effective method.