Leo Strauss is one of the most excellent and greatest historians of political philosophy and political philosophers in our time. This paper is an attempt to introduce, comprehensively but not equally, his unique and basic views on political philosophy. First of all, it introduces briefly how he defines political philosophy as a distinctive kind of political thought which pursues consistently general and eternal knowledge about both the nature of political things and the right or good political order. Regarding the decline of contemporary political philosophy, this paper introduces how Leo Strauss tracks of the roots of the decline to the radical rejection of political philosophy by both positivism and historicism, the two powerful adversaries of political philosophy in contemporary philosophy. With regards to the revival of political philosophy, this paper introduces how Strauss finds out the way to criticize both positivism and historicism in defense of political philosophy from his study of the history of political philosophy and how he discovers the starting – point for reviving contemporary political philosophy from his return to classical political philosophy.