THE REGIONAL GROUNDS OF DISINTEGRATION BETWEEN IRAN AND SAUDI ARABIA (2005 - 2011)

There have been great ups and downs in relations between Iran and Saudi Arabia before and after the Islamic Revolution of Iran. For the US role before the revolution along with the ruling elite''s role afterwards، both countries stepped toward friendship. However، after the revolution، their relations have been deteriorated. The research aims at inspecting the general reasons of disintegration between these two، particularly the regional grounds since 2005 to 2011. The hypothesis suggests the developments in Iraq، Lebanon and especially Bahrain as the most important regional drives for this disintegration as well as the both sides'' effort to expand their authority in the region as the main regional cause for instability in their relations.