The patient was 71-year-old male under treatment at a clinic for hypertension, aortic regurgitation, alcoholic hepatitis and dental treatment. He mainly complained fever and anorexia. Since blood culture examination revealed Listeria monocytogenes and echocardiography exhibited vegetation at the mitral leaflet, the patient was diagnosed as infective endocarditis. Fever and inflammatory reaction were improved after penicillin administration; however, he had fever on the 24th hospital day. CT revealed type IIIb acute thoracoabdominal aortic dissection which was not observed on admission. The blood pressure was controlled with antihypertensive agents. He could leave the hospital on the 61st day.