We present a case of a 54-year-old woman with a left-sided complete duplication of the ureter. The upper moiety drains in the proximal third of the vagina, which results in an ureterocele and urinary incontinence. The ureteral orifice of lower moiety ureter was normal. Duplication of the ureters with distal, infra-sphincteric, vaginal implantation is an uncommon congenital anomaly and a rarely seen entity in adulthood as a cause of urinary incontinence. MR colpocystodefecography showed an ureterocele in between the bladder and the rectum. Computed-tomography showed the duplicated ureters and ectopic ureter with proximal implantation on the renal upper pole and distal implantation on the proximal third of the vagina.