This paper examines the religious ideology of the Hashemite Kingdom of Jordan and its position in the Modern Middle East. The Hashemite Kingdom of Jordan has the religious characteristics of a Sunni state. The Hashemite royal family has a lineage that can be traced back to the Prophet Muhammad, and they affirm its religious correctness by many activities. In the situation of religious conflicts in the Modern Middle East, Jordan plays a significant role, using such religious authority or legitimacy, and takes a religious initiative. This paper traces back to the formation of Transjordan, predecessor of the Hashemite Kingdom of Jordan, because this period relates strongly to the legitimacy of the Hashemites. Based on its religious authority, Jordan promotes Sunni religious ideology against Shiite Revolutionalism and Sunni Radicalisms such as Salafism and Jihadism. Attacked from both sides by these two radical ideologies, Jordan revives Sunni thought itself in order to oppose these radicalisms. The aim of this paper is to analyze the religious policy of Jordan in the religious conflicts in the Modern Middle East.