Megaureter is a disease including variable anomalies. It may be caused by either a primary cause or secondary to specific pathologic origin. Primary obstructive megaureter is a subgroup of megaureter and an uncommon disease. Its etiology is unclear and the management remains controversial. Our report includes management of three cases in the most recent four years. The follow up period of these cases ranged from 10 months to 4 years. Their prognosis is good.