This chapter discusses the problematics involved in what I call the “Heideggerian Laozi.” By this term I mean: The notions from the Daodejing adduced in comparative studies in relation to Heidegger are often adapted to Heidegger’s key terms in isolation from the complexity of his philosophy as a whole. First, I review the early history in which the “Heideggerian Laozi” emerged. I show that the alleged affinity between Laozi and Heidegger was influenced by the concrete history of reception of Heidegger in America and was subject to the dubious translations as well as to the inadequacy of interpretations of the Daodejing. Then, I examine the true meaning of Laozi’s notion of wu and display its crucial difference from Heidegger’s “das Nichts.” The word heng 恆 from the Mawangdui Laozi has been highlighted as a most fundamental notion that indicates the “temporality” of dao. In the last section, building on insights and arguments from scholars from a variety of fields, I show that this claim is far from self-evident.