An aneurysm of the subclavian artery is rare. Recently, we experienced a case of a rupturedsubclavian artery aneurysm presenting as hemoptysis. The patient had experiencedatypical chest discomfort, and computed tomography (CT) revealed a smallaneurysm of the left subclavian artery (SCA). Hemoptysis occurred 2 weeks later. Follow-up CT showed a ruptured aneurysm at the proximal left SCA. Endovasculartreatment with a graft stent was performed by bilateral arterial access with a 12-Frintroducer sheath placed via cutdown of the left axillary artery and an 8-Fr sheath inthe right femoral artery. A self-expandable Viabahn covered stent measuring 13×5 mmwas introduced retrogradely via the left axillary sheath and was positioned under contrastguidance with an 8-Fr JR4 guide through the femoral sheath. After the procedure,hemoptysis was not found, and the 3-month follow-up CT showed luminal patency ofthe left proximal SCA and considerable reduction of the hematoma.