In Being and Time Heidegger believes that Dasein is the only being who has existence, he also argues Dasein has two existential modes: authenticity and in-authenticity. inauthenticity is usual Dasein’s existence, A way of Being in which Dasein has strayed away of himself and has fallen into the chaos of others. In this way of Being he deals to beings as others do, just in terms of efficiency and benefits. Although Heidegger considers in-authenticity as often way of Dasein’s Being but another way is possible. He calls another way of Dasein’s Being, authenticity. In this type Dasiesn transcendences from usual Being. In his later thought, Heidegger attributes authenticity and inauthenticity to different revealing of Being. In this view, Art and Technicque are two important status of revealing. So perhaps Art and Technic could be regarded as two determinative domains of Dasein’s Being.