The aim of this paper is to examine the theme about ‘death’ in terms of ‘existing’ of Levinas’ Existentialism in Saul Bellow’s Mr. Sammler’s Planet and Paul Auster’s Man in the Dark which I think play very important roles in human existing in the 20th and 21st century. According to Levinas, jewish Russian existentialist, existing is always grasped in the existent, and we human beings as the existent precsely express the fact that existing is always possessed by someone or the other. Bellow and Auster did not always argue that they are jewish nor were obsessed with the idea of revealing jewish spirituality to the world to disperse the conception of Hasidism nor they are existentialists. But Bellow had steadily looked for the value of existence to get some reasons for doing good to make the world morally pure. To Bellow, being moral means the way of existing in the world in order to keep the contract of God. On the other side, Auster seemed to be lost in a maze finding his way out in his early novels. In his so-called detective novels, he never gave any answers to solve the questions which the author had offered to readers, even to the detective himself. But in Man in the Dark Auster tries to find his answer to the question how to exist in this merciless America carrying on the second war against Iraq. With living his daughter and grand-daughter, the septuagenarian August Brill, the hero in Man in the Dark learns to understand the others who are trying to capture the concept of existence. Likewise, Mr. Sammler who is septuagenarian too, tries to understand the means of sanctification since to exist is to gather up the dispersion of the sacred in the profane in the morally ruined New York, the pocket edition of America. In the process of existing and getting the rights of man, it is we human beings that have the right to life and the right to survive with the other. Bellow and Auster just present two archetypes who feel sorry about depraved mind and society and are ready to stand bravely against death to come but finally these two heroes are willing to undertake the burden of existing giving their hands to the others who need explanation about living in this depraved world, America.