Pancreatoblastoma is uncommon in children and is exceedingly rare in adults. Prognosis is known to be good if the tumor is discovered prior to metastasis. Complete tumor resection is the most important factor for long survival. We report two cases of pancreatoblastoma in a 4 year and 7 year-old females. Palpable abdominal mass was accidentally discovered by their parents. Abdominal CT scan showed huge retroperitoneal mass of unknown origin in one case and of the pancres in the other case. At laparotomy, well encapsulated tumor mass (10×10 cm in diameter) was noted in the body of pancreas in one case, and well encapsulated tumor mass (8×7 cm in diameter) in the tail of pancreas in the other case. We resected the tumor and saved spleen in both ases. Histologic examination revealed that the tumors were pancreatoblastoma. Patients received postoperative chemotherapy with 6 cycles of cisplatinum, adriamycin, ifosfamide and etoposide and are alive in good condition 19 months and 17 months after operation.