Left ventricular(LV) aneurysm is one of common complications of acute myocardial infarction. Inferior location of LV aneurysm is relatively rare, but it often compromises posterior papillary muscle function and causes early death due to severe mitral regurgitation. Survival of patients with inferior LV aneurysm depends, to a great extent, on the extent of the involvement of mitral valve apparetus. We describe three cases of 'giant' inferior LV aneurysm, which were observed in patients with myocardial infarction.