We present four patients with non-Hodgkin's lymphoma of the small bowel. Three of the patients were men. Two patients presented with acute abdomen due to tumoral perforation and the remaining 2 presented with abdominal pain and other effects of the mass. The tumors were located in the ileum (1 patient), jejunum (2 patients) and jejunoileum (1 patient). All patients underwent resection of the affected segment. Three patients had large B-cell lymphomas and the remaining patient had a T-cell lymphoma associated with celiac disease. Different combinations of chemotherapy were administered. Only the patient with T-cell lymphoma died due to disease progression. Clinical aspects and the therapeutic strategy used in these tumors are discussed.