The Fukui Earthquake with a magnitude of 7.1 occurred on June 28, 1948. This earthquake occurred at the eastern margin of the Fukui Plain. The major active fault, named Fukui Heiya Touen Dansoutai, exists in this area. However, clear indication of active fault does not exist at the westernmargin of the Fukui Plain. We investigated the possibility of an active fault. Some phenomena showthe characteristics of an active fault in that area.