Laparoscopic sentinel lymph node dissection and stomach preserving surgery in early gastric cancer is less invasive method which can increase quality of life. Current stomach preserving surgery after sentinel lymph node dissection produce transmural communication and expose the tumor to the peritoneum during operation. An endoscopic full-thickness resection method with a simple suturing technique that does not expose the gastric mucosa to the peritoneum (non-exposure simple suturing, NESS) was recently developed.