We used transurethral electrovaporization of the diverticular mucosa as the primary treatment for an acquired bladder diverticulum in a female patient. The bladder diverticulum was secondary to bladder outlet obstruction from a previous pubovaginal sling. In comparison to either open or laparoscopic bladder diverticulectomy, transurethral electrovaporization of the bladder diverticulum was effective in significantly reducing the diverticular size while being less invasive, requiring a short operative time, and a quick patient recovery.