Echocardiography is the technique most used in the diagnosis of aortic dissection. In this article the echocardiographic signs of aortic dissection are described. The following issues regarding the usefulness of echocardiography in aortic dissection are reviewed as well: detection of entry site, distinction between false and true lumen, assessment of aortic regurgitation, ventricular function, aortic branches involvement, pericardial effusion and follow-up.