Carcinoma of the stomach is usually considered a disease of middle aged or elderly patients and is rarely suspected in young adults. However carcinoma of the stomach in the young adults is an aggresive malignant disease with nonspecific symptoms and worse prognosis than order age group because of late diagnosis and increased incidence of undifferentiated form. In an attempy to identify further the natural history of carcinoma of the stomach in the young acults, we reviewed 68 cases of stomach cancers in patients 30 years of age and less at Severance hospital. The results were as follows: 1. The over-all male to female ratio in the young adult was 1:1.34 and in loder age group was 2.44:1. 2. Common symptoms included epigastric pain, weight loss and vomiting. The mean time interval between oneset of symptoms and the first visit to a physician was 3 months. 3. Usually diagnostic aids were UGI series and endoscopic examination. 38 patients underwent an exploratory laparatomy, and esions were amenable to curative or palliative resection. 4. In the young age Bormamm type III and IV were predominent, while in the older age group Bormann type II and III were common. 5. The majority of tumors occured in the cardia, fundus and upper body. 6. Histologic diagnosis were poorly differentiated adenocarcinoma, signet ring cell carcinoma and anaplastic carcinoma in orders. 7. A relatively high incidence of pregnancy and Krukenberg tumor in the young age were noted.