Dysphagia resulting from esophageal compression by anomalous aortic arch vessels is not common, often overlooked without every single effort to find out the reason. In case that endoscopy or barium swallow to evaluate dysphagia shows extrinsic esophageal compression, the next step like EUS, CT or MR imaging is generally considered to evaluate the cause of compression. CT or MR imaging is very excellent to figure out the correlation between the esophagus and its surrounding structure. But the anomaly of aortic arch is frequently ignored in review of CT or MR imaging with little attention to vascular structure because it is a very rare etiology of dysphagia. Herein, we report a case in which EUS and 3D-CT were used to establish the diagnosis of dysphagia due to congenital vascular anomaly, right aortic arch with aberrant left subclavian artery with Kommerell`s diverticulum.