Most bronchogenic cysts originate in the mediastinum, while 15% to 20% occur in the lung parenchyma. According to the literature, most intrapulmonary cysts occur in the lower lobes. But, they are rarely located in an extrathoracic site, such as subdiaphragmatic retroperitoneal area. We describe a paraesophageal intra-abdominal bronchogenic cyst, first considered as gastric submucosal tumor. Resection was successfully realized by laparoscopy. A 20-year-old female was admitted to our hospital with incidentally detected gastric submucosal tumor. At operation, there was a 2.5x2 cm sized cystic tumor that was isolated from the gastric wall. We performed tumor resection laparoscopically. The postoperative course was uneventful and the patient was discharged on the second postoperative day. Histological examination reported a bronchogenic cyst. We, herein, report this case.