It is provoking that Heidegger especially uses a concept like conscience -which is used more or less as a concept belong to morality- in a way that is closed to ethics: For him, conscience is a voice where he finds Being's ground. According to Heidegger history of Western philosophy was insufficient to understand and explain Being. With this history and its metaphysics being rendered by deconstruction (Destruktion), it is rebuilt with not ideational and conceptual mediations but with Dasein. Conscience (Gewissen) as one of the fundamental structures such as Being-in-the-world (In-der-Welt-Sein), being-together (Mitsein), Dread (Angst), Care (Sorge), Death (Tod), being-towards-death (Sein zum Tode), has a central place with regard of understanding Dasein. Dasein who is lost in everyone's publicity and talking, while listening the they-self, can't hear his/her own self. As a way out from such a situation, at first, Dasein needs to pay attention to ownself. Calling of the conscience is a calling which enables Dasein to not hear others' voice but to give ear to his/her own voice and to hear/get his/her ownself. Can this calling take us to the dwelling of ethos? In Letter on Humanism, Heidegger uses the word ethos basically in a sense of "actualizing existing by dwelling somewhere, by acting." In this way, the analysis of conscience can be read as before ethics, as an analysis which makes ethics possible. Just with this condition, ethics is not a frame of social linkage anymore: Being a person is a person's creating, constructing himself/herself by being himself/herself by his/her actions