Congenital bladder diverticula (CBD) are an outpouching of the mucosa through the muscular wall of the bladder. Large CBD may be presented with a serious urological problem in childhood. A 6-year-old boy was admitted with the complaint of recurrent urinary tract infection and urinary retention. Voiding cystourethrogram revealed a bilateral large CBD. Cystoscopy was performed before surgery to rule out bladder neck pathology, for direct visualization of diverticula, and to see the opening of the ureters. Transvesical diverticulectomy is a reliable technique for surgical treatment, if necessary, and can effectively be combined with the management of associated other pathology.