Gastric teratoma is an extremely rare neoplasm accounting for less than 2% of all teratomas in children. Clinical manifestations usually consist in vomiting, palpable abdominal tumor and/or bleeding from the upper gastrointestinal tract. Considering its rareness and the scarce information in the literature we present a case of gastric teratoma in a 2-month-old boy with vomiting after feeding, persisting since birth. The child was referred for examination with clinical suspicion of hypertrophic pyloric stenosis. He also suffered from septic meningitis with fulminant course which caused his death 5 days after the diagnosis of teratoma was done. Imaging studies were indicative of the diagnosis.