This study analyses the dimensions of the US designation of Iran as a state sponsor of terrorism. It discusses the relationship between Iran and Al Qaeda as a case study of Iran's relations with non-state armed actors (NSAA). It examines issues related to the relationship's historical background, the relationship's context, and structural changes. According to the research on this topic, several analyses show that the relationship between Iran and Al-Qaeda can be traced back to the period before 11 September 2001. The number of studies on Iran-Al Qaeda relations has increased significantly since 9/11. This is because the relationship between Iran and al-Qaeda has acquired a new dimension. The study aims to provide a comparative perspective by examining American freign policy rhetoric, al-Qaeda leaders' statements, Iranian politicians' arguments, intelligence documents, academic studies, and news for objective analysis. The study's primary concern is to discuss the structure of the relationship between Iran and al-Qaeda and to analyze and conceptualize the factors that bring these two groups closer or further apart, which have two different sects and agendas. A literature review shows differing views on how Iran and al-Qa'ida are related, but a common conceptual consensus has yet to emerge. This study uses the “process tracing method” to examine Iran-Al Qaeda relations.