Gastric diverticula are rare disorders which present usually with vague upper abdominal symptoms. The diagnosis is based on endoscopic and radiologic findings, but it may remain uncertain until the operation. Herein we report the case of a 46-year-old woman with a diverticulum of the posterior aspect of the upper part of the gastric fundus, referred to our attention for epigastric pain. The preoperative work out evidenced a pouch of the gastric fundus which was misinterpreted as a paraesophageal or a diaphragmatic hernia. The operation was performed by laparoscopy with a 4-port technique and the diverticulum was resected by an endoscopic stapler. The patient is well and symptom-free more than two months after the operation.