The Yami have two important directions named "teylaod" (sea quarter) and "teyrala" (mountain quarter) which regulate their houses and action. In this report we discuss about the meaning of to "dwell" between sea and mountain topo-logically through their myth. We observe particularly the flood myth, because on the flood sea and mountain present themselves. Sea swallows up the people, and mountain remains as the last place to survive. At that time we can make clear the meaning of place to "dwell" between sea and mountain.