<strong>BACKGROUND</strong> Heterotopic pancreas is pancreatic tissue that presents outside the normal anatomical location. It is mostly discovered in the upper gastrointestinal tract (mostly the foregut). We report the first case report of incidentaloma of duodenal heterotopic pancreas in obese patients during laparoscopic sleeve gastrectomy. <strong>CASE REPORT</strong> A 15-year-old Saudi male obese patient was admitted electively for laparoscopic sleeve gastrectomy. Incidentally, during intraoperative procedure, a duodenal nodule was noted in the first part of the duodenum. A wedge resection of the mass was done after a standard laparoscopic sleeve gastrectomy was accomplished and it had an uneventful postoperative course. The histopathological examination showed heterotopic pancreas tissue. <strong>CONCLUSIONS</strong> Gastrointestinal stromal tumors are found to be the most common incidental pathology during bariatric surgery. The safety and efficacy of excision of similar lesions during laparoscopic sleeve gastrectomy needs to be further investigated.