A 47-year-old man presented with a 6-day pain in the right chest. Abdominal CT showed an elliptical homogeneous mass, which was closely related to the posterior wall of the stomach and the lesion grew from the posterior wall of the stomach to the abdominal cavity in the wedge shape. The enhanced scan showed no enhancement in the lesion. The left adrenal gland and the upper pole, pancreas and spleen were changed due to compression. Carbohydrate antigen 72-4 (CA72-4) was 45.1U/ml (0.00～5.30 U/ml). The gastroscopy results showed that there was protruded lesion in the posterior gastric wall and atrophic gastritis in the superficial stomach. Laparoscopic exploration and partial gastrectomy were performed. An 8cm × 7cm tumor was found at the posterior wall of the fundus near the cardia, with smooth serosal surface. The cystic mass was smooth surface, filled with yellow thick liquid. Microscopically, the cystic wall tissue was lined with pseudo-stratified ciliated columnar epithelium, and mucous glands were seen under the epithelium. Pathological diagnosis showed bronchogenic cysts of the gastric submucosal. At 2-month follow-up, the postoperative recovery was good.