In this article, I will juxtapose Simmel’s theory with Martin Heidegger’s thought. I intend to gain, bythis, possibly fundamental (in the existential ontological, Heideggerian sense of the word) sight of his position.In Reading Simmel “by using Heidegger,” I will inquire about his interpretation of “being-in-the-world” andabout a place that the phenomenon of money occupies within the limits of being-in-the-world. As it may turn out,this method of analysis will enable us to look at Heidegger’s thought in a new way, revealing a certain kind ofanachronism or at least a one-sided view of human beings. The question is as follows: whose interpretation of theexistential-ontological structure of Dasein is more adequate, Simmel’s or Heidegger’s?