An 84-year-old female was admitted with sudden-onset upper abdominal pain. Contrast-enhanced computed tomography (CECT) revealed complete occlusion of the superior mesenteric artery (SMA). After transcatheter infusion of urokinase, embolic occlusion resolved. However, the pain recurred when she started eating. CECT revealed a lesion with thickening of the intestinal wall; therefore, laparoscopy-assisted surgery was undertaken. Histological examination yielded a definitive diagnosis of ischemic enteritis caused by SMA occlusion. Rapid diagnosis and treatment are important in SMA occlusion, and careful observation of the clinical course is recommended after transcatheter therapy.