Unilateral incomplete duplication of ureter of right kidney was observed during routine dissection of an adult male cadaver at R.N.T. Medical College, Udaipur. Two ureters of right kidney joined just before entrance into urinary bladder and opened in urinary bladder by a single ureteric orifice. Duplication is one of the commonest anomaly of genitourinary system and may be accompanied by other congenital anomaly or it may be a cause of urinary tract infections, calculi or it may get injured during pelvic surgeries. In this case study we have discussed embryological development and clinical implications of such type of anomaly.