US-Afghanistan's Strategic Partnership Agreement and I.R. Iran's National Security

National security which is the main concern of any country is a multilateral situation that makes it difficult to fulfill. Besides the complexity of the concept of security, the threat of the national security of the countries has also different dimensions. The geopolitics of the countries around I.R. Iran had always a significant impact on Iran’s national security.United States’ presence in Iraq during recent decade has affected Iran’s national security and the continuation of this presence –which by signing strategic agreement between two countries in 2012, as well as security agreement will get a formal phase – can cause different security situations around Iran that can lead to the increased "danger and threat" to the Islamic Republic of Iran. So, besides examining the strategic agreement of the United States and Afghanistan in this paper, it has been tried to investigate and evaluate its impact on I.R. Iran’s national security.