The sonographic diagnostics of an aneurysm of the abdominal aorta has obtained a high value on account of the high reliability and the rapid availability of the investigation in connection with the absolute safety of the method. Form, extension, calcification, haemodynamics, thrombosis and dissection of an aneurysm of the aorta can sonographically be demonstrated and measured by longitudinal and transversal sections. As non-invasive approach the ultrasound tomography in the order of the graduated diagnostic method stands before the computed tomography which is not always at once available and before the angiography which have their qualification in the case of a planned operative approach above all for the purpose of the exact topographic differentiation between suprarenal and infrarenal extension.