Giant cell myocarditis is an unusual and frequently fatal form of myocarditis. A 37-year-old woman presented with resistant cardiac failure and left ventricular aneurysm. She underwent Dor's endoaneurymorrhaphy and was histopathologically proved to have giant cell myocarditis. She had significant improvement of symptoms and was alive 13 months after surgery. Dor's endoaneurysmorrhaphy may be a useful therapeutic modality in selected cases of giant cell myocarditis.