A 51-year-old woman with adenocarcinoma of the esophagogastric junction (E-G J), which spread from the E-G J to the cervical esophagus, is reported. Only two cases of carcinoma in the E-G J with the extension of the tumor to the upper or middle portion of the intrathoracic esophagus have been reported in the Japanese literature in the past two decades and there have been no previous reports of E-G J carcinoma with extension to the cervical esophagus. At first, the invasion to the esophagus in our case was thought to be continuous. Histological examination, however, revealed that the tumor in the esophagus was discontinuous in some portions and that the lymph vessels were remarkably invaded. These findings suggested that the extension of the tumor to the esophagus was lymphogenous metastasis.