Tortuosity of the common carotid artery is not a rare disease. Diagnosis of the disease is usually made by digital subtraction angiography (DSA). However, the examination for the diagnosis should have few effects on the body because the disease often involves seniors who can easily develop complications such as hypertension. We reported two cases in which magnetic resonance angiography (MRA) and ultrasonography were useful in establishing diagnosis. These examinations are also preferable because of their simplicity and minor impact on the body.