Two cases of bilateral adrenal neuroblastoma in infants are reported. The first patient presented with abdominal distension due to metastatic hepatomegaly and the second patient was found because of elevated urinary VMA by VMA mass-screening system. Both were under one year of age and were classified as stage IVs neuroblastoma. In each case unilateral adrenalectomy was performed and the contra-lateral adrenal tumor was observed. The remaining tumors slowly decreased in size and clinical progress was good. A review of published cases of bilateral adrenal neuroblastoma suggests that the characteristics of this disease are age less than 1 year, stage IVs, and good prognosis.