Leiden Factor V mutation, associated with resistance to activated protein C, is a prothrombotic state found in 20% of the patients with a first episode of deep-vein thrombosis. We report the case of a 30-Year-old woman with a history of intermittent abdominal pain who developed small bowel infarction requiring extensive small bowel resection. Biological search for prothrombotic disorder showed resistance to activated protein C due to homozygosity for the factor V Leiden mutation. Long-term anticoagulant therapy was initiated. Unexplained abdominal pain may be due to venous mesenteric ischemia, which can be associated with factor V Leiden mutation.