The research was created with the aim to know about restoring Qatar's diplomatic relations to Iran that occurred in the Gulf region in 2017. The author will also discuss bilateral relations between Qatar and Iran and the problems that exist between Qatar and Iran before the restoration of diplomatic relations between the two countries. In this study will explain specifically what factors are considered by Qatar in choosing a step to make a restoration of diplomatic relations with Iran. The method used in this research is qualitative by using secondary data. In this study the author uses 1 theory that is the theory of rational choice. The rational choice theory is used to find out what factors and benefits Qatar chooses before choosing to make a restoration of diplomatic ties to Iran.