Gastrointestinal involvement has been reported to occur in about 10 to 20% of patients with malignant lymphoma. The most common gastrointestinal site for the lymphoma is the stomach, followed by the small intestine, the ileocecal region and the colon. Esophageal involvement by a malignant lymphoma is unusual, and that by a primary lymphoma is extremely rare. When a lymphoma is found in the esophagus, generally it is a case with contiguous involvement of the gastric fundus or the cervical node, with secondary to mediastinal lymph node compression, or with late manifestation of advanced disease. Such cases cannot be labeled as primary esophageal lymphoma. We describe a case of primary esophageal malignant lymphoma diagnosed by endoscopy and CT scan. It was treated with concurrent chemoradiation, resulting in complete remission; nowever an esophageal stricture developed, so esophageal bougienation was performed several times. An Operation was performed because the esophageal stricture was not improved by endoscopic dilatation.