Public Administration is an activity as old as human civilization. In modern age it became the dominant factor of life. To Study about meaning, scope and importance of Public Administration is the main objective of this book. Public Administration as independent Subject of a social science has recent origin. Traditionally Public Administration was considered as a part of political science. But in Modern age the nature of state-underwent change and it became from police stale to social service state. As a consequence, the Public Administration, irrespective of the nature of the political system, has become the dominant factor of life.