Esophageal metastasis from breast cancer is rarely observed. We encountered a case of long-term survival after esophageal metastasis from breast cancer that was treated with esophagectomy. A 79-year-old woman developed dysphagia 26 years after radical mastectomy. Endoscopic examination revealed stenosis at the mid-thoracic esophagus. An esophageal biopsy led to a diagnosis of undifferentiated cancer. A computed tomography (CT) scan revealed a massive tumor in the esophagus, but no distant metastases. Esophagectomy was performed with the suspicion of primary or metastatic esophageal cancer. Histopathologically, the excised tumor was an adenocarcinoma, which had histopathological features similar to that of the breast cancer. Accordingly, the adenocarcinoma was diagnosed as esophageal metastasis of the breast cancer. The patient is still alive 8 years after the esophagectomy.