This book offers the first exhaustive presentation of Heidegger’s reception of Søren Kierkegaard that is grounded in historical philology and, at the same time, systematically oriented to philosophy. By placing their relationship in the context of Kierkegaard’s German-language transmission history and Heidegger’s thought processes, it reveals the singular features of Heidegger’s reception of Kierkegaard across various phases of his thinking.