False aneurysm is one of the life-threatening infective endocarditis (IE) complications. It can occur even long after a well-treated IE. We report the case a 43-year-old. Treated for a blood culture negative aortic valve endocarditis with 4 weeks antibiotic therapy. One year later, he presented a false aneurysm of the right lateral wall of the aorta responsible of right coronary artery compression. He underwent urgent surgery with a successful removal of the false aneurysm and a Bentall’s procedure.