This investigation is concentrated in the foreign Policy changes of France and Saudi Arabia due to emergency of the Islamic State on Irak and the Levant during 2014-2016/I. For this purpose, the investigation will take into account the theory of James N. Rossenau about Compared foreign Policy and the theory of alliances or international coalitions by Daniel S. Morey. Furthermore, this document is designed to be a compared model of foreign policy between two states. To achieve the objective purposed, the document will be divided in three sections: The first part will analyze who it was the foreign policy of France and Saudi Arabia before the emergency of the Islamic State (“EL INICIATORIO”). It is important to highlight that this terrorist group is the one who generates the change in foreign policy of both states. The second part will analyze the emergency of the Islamic State (EL ESTÍMULO), and finally, the third section will expose the foreign policy changes generated by (EL ESTÍMULO) or by the emergency of the Islamic State (EL IMPLEMENTATIVO). Is in this section where the theories are going to be applied.