Victory of the Islamic Revolution, collapse of the Soviet union, independence of the Central Asian and Caucasian countries, war in Afghanistan, the U.S attack on Afghanistan and Iraq, unrest in Arabian Middle East, … along with the other variant geopolitical factors like energy, security, terrorism, nuclear issues, missile defense shield, …caused the geopolitical role of Iran in Middle East to be increasingly highlighted. Therefore, in that special period, Iran was looking for a role suitable for its position in the field of game. One of these fields is Central Asia where Iran due to its cultural, historical, social and political similarities together with the geographical factors calls for playing a leading role in the mentioned region.Among the Central Asian countries, Turkmenistan’s special position due to possessing of the vast volume of gas resources, its long common borders with Iran and its immediate need to the revenue earned by the export of gas for its development process on the one hand, and Islamic Republic of Iran’s need to meet its northern parts’ gas requirements through Turkmenistan’s resources that in the recent years due to increase gas production in Iran this country did not need to this process and his effort go toward transfer Turkmen gas to other country and use for that pay toll.Turkmen’s effort after creation or independence from soviet began and led to singe a contract about gas transfer to Iran and the in the first decade in 21’’ century to china. While there are a lot of failed project such as TCGP, NABACO, TAPI 1 & 2.Turkmenistan with economic issue and increase gas export in diversification planning on pipeline want to reduce Russian dominated and monopoly in gas market in his country so Iran has important situation in Turkmenistan strategy dispute the tension between to country while other regional and international actor such as Russia Turkey, EU. USA, China, India have their interest that led to Turkmenistan gas as a complex economic and political issue.Referring to these aspects the purpose of this article is explained and clarification Iran’s situation in Turkmen gas to increase cooperation between two states.