A 70-year-old woman with autoimmune gastritis was referred for an 8-mm subepithelial lesion. Staging EUS identified a potential T1 type 1 gastric neuroendocrine tumor (NET) without nodal metastases. During endoscopic resection with multipoint elastic traction, a muscle-retracting sign (MRS) with the lesion adherent to the oblique muscularis propria was observed. Gastric endoscopic intermuscular dissection (EID) was performed en bloc. Histopathology showed R0 resection of a pT2, well-differentiated NET G2, without lymphovascular invasion. Another G1 NET was identified in a lateral margin. The multidisciplinary team and the patient opted for endoscopic and imaging follow-up due to comorbidities and surgical risk. To our knowledge, this is the first report of a gastric muscle-retracting sign and the second report of gastric EID.