Adenomyoma of stomach is a rare condition that may or may not present with symptoms, often depending on the location of the tumor. Here, we present a case of gastric adenomyoma with pancreatic heterotopia in the pyloric region causing outlet obstruction. Clinically, radiologically, and histologically adenomyoma of the stomach may mimic gastric malignancy. Awareness of this lesion is necessary to avoid misdiagnosis of the condition.