Abdominal lymphangiomas are a rare congenital benign vascular malformation of the lymphatic system occurring mainly in childhood . We experienced a case of abdominal cystic lymphangioma in a two years and five months old little boy. He was admitted due to frequent bilious vomiting and paroxysmal abdominal pain. Plain abdominal X-ray revealed distention of stomach. Abdominal ultrasonography (US) revealed a cystic mass with septum over right midabdomen and marked distended stomach. Abdominal computed tomography (CT) showed a loculated hypodensity cystic-like mass over right lower quadrant. A multilobulated cystic mass was found on the mesentery of the jejunum at exploratory laparotomy. The tumor, mesentery, and the involved bowel were resected and the bowel continuity was restored. Postoperative course was uneventful, and there was no more frequent abdominal pain or vomiting in 2-year follow up.