A rare case of aneurysm of the celiac artery due to arteriosclerosis was presented. The patient was 56-year-old female and had suffered from hypertension for 4 years, and recently, from dyspepsia prior to admission for 2 months. The operation was operated upon by interposition of an autogenous tubular saphenous vein graft between the proximal celiac artery and the common opening of the hepatic and the splenic arteries in the opened aneurysmal sac with inclusion technique. The postoperative course was uneventful.