The patient was an 87-year-old woman who had a thoracic aortic aneurysm that had been followed conservatively by a general physician. She was transferred to our hospital in a shock state due to rupture of the thoracic aortic aneurysm. Computed tomography revealed a large aneurysm with a maximum diameter of 80 mm in the distal aortic arch. She developed hemorrhagic shock due to hemothorax. Thoracic endovascular aortic repair was difficult because of marked kinking of the descending aorta. We performed emergency open stenting under mild hypothermic circulatory arrest using our unique procedure. The patient was discharged from the hospital 14 days after the surgery without any complications. Herein, we report a successful case of less-invasive, quick, open stenting treatment for an octogenarian patient in a shock state due to ruptured thoracic aortic aneurysm.