As a palliative bypass for unresectable gastric or periampullary cancer, gastrojejunostomy (GJ) is sometimes associated with postoperative delayed gastric emptying. We report the successful laparoscopic application of this procedure in a 78-year-old man with duodenal obstruction. Computed tomography revealed a mass in the duodenum along with multiple masses in the liver. A radiological image showed an ulcerative tumour in the third portion of the duodenum occluding the lumen. He was diagnosed as having an unresectable duodenal cancer with multiple liver metastases. He needed palliative bypass surgery. Laparoscopically, the stomach was partially divided using an endoscopic autosuture device, and end-to-side GJ was performed successfully. He was given a normal diet on the fourth postoperative day, and there was no delayed gastric emptying. Laparoscopic gastric partitioning GJ is a feasible and safe procedure to prevent postoperative delayed gastric emptying in case of malignant duodenal obstruction.