Emmanuel Levinas, a French philosopher with a Jewish background, has made a great impact on the diverse branches of current academic society such as literature, theology, politics, feminism, and inter-disciplinary studies through his unique conception of ethics. Mainly due to his emphasis on the word ethics, he is regarded by some commentators as the true originator of the “ethical turn” of contemporary thought. Indeed, in these days of post-critique we are much exposed to ethical terminology like death, responsibility, justice, and so on. In this respect, it is said that all of us are more or less indebted to Levinas. This study contends that the best way to look into Levinasian ethics and its implications is by way of the philosophical works of Jacques Derrida, who has also left an enormous influence on the post-war academic scene with his unique brand of philosophical thought called deconstruction. This is not only because as students of Husserlian phenomenology and Heideggerian ontology both Levinas and Derrida have much in common in their academic origin, but because they interacted with each other academically by writing on the other’s works, sometimes critically and other times supplementarily. By doing so, this study tries to investigate the theoretical relations that their interactions represent. This study emphasizes that, in spite of lots of common factors and traits that their works show, between Levinas and Derrida there lies a gap that cannot be filled with such words as influence, reception, recognition, and so on. This fact is derived from the fact that Levinas’ ethics and Derrida’s deconstruction act onthe two different levels of investigation: the former basically on thematics, the latter on a strategy of reading. However, each of them gave their counterparts a reflective chance to look back upon their confrontations with philosophic dilemma concerning the (im)possibility of philosophy.