This book has been developed from a research about Accountability in public Organizations. It has done in Iranian public Organizations. The main idea of this book is explanation of accountability according to Constitution of the Islamic Republic of Iran, and has compared with Germany, France, Japan, England, USA, Hong Kong countries in content of executive accountability, accountability of the judiciary, the executive supervision and accountability in against it, judicial supervision and accountability to it, decentralization, supervision and accountability, administrative system, supervision and accountability, the ways of obtain the rights of client, and civil and social supervision of citizens and government accountability.