The significance of ultrasonography in the evaluation of metastasized neck and supraclavicular lymph nodes from lung cancer was analyzed. By ultrasonography, the lymph nodes could be visualized clearly as low-echogenic round areas, and the size could be precisely measured in three dimensions. It was also possible to diagnose whether or not the lymph node adhered to the surrounding tissues and to determine the relationship and the connection of supraclavicular lymph node and upper mediastinal lymph node. The therapeutic effect related to the size of the lymph node was evaluable by ultrasonography. Therefore, the ultrasonographic approach to the neck and supraclavicular lymph nodes metastasized from lung cancer is considered to be useful for clinical use.