Numerous countries around the world have made exceptional efforts to combat terrorism. Many of these efforts have been undertaken individually and outside the scope of the United Nations, despite its charter designating it as the authority responsible for addressing issues of international peace and security through the Security Council.Describing these efforts, they represent the endeavors of states directly affected by terrorism. However, this does not imply that the United Nations, as the institution under which the international community operates, has been distant from this highly significant matter. On the contrary, the diplomatic history of the issue of terrorism found its primary arena within the United Nations. Legal discussions began within the framework of UN bodies and agencies. Mechanisms ensuring the international community's response to combating terrorism were appropriately developed within UN agencies. Additionally, the executive mechanisms can be found in the organization's efforts. Moreover, the international legal confrontation of terrorism was fundamentally organized through the United Nations. Reports, resolutions, treaty formulations, and conferences were significantly conducted within the premises of the international organization. The United Nations also served as the primary sponsor of other international conferences closely examining issues directly related to international terrorism, attempting to blend statements and recommendations in a manner consistent with the accepted concept of terrorism, achieving widely acceptable results among all member states. Regarding individual state activities, efforts to combat terrorism legally and materially vary according to the interests of those states and their concept of terrorism, which often does not align with the concept upheld by other countries. Therefore, this study will explore the concept of terrorism in the first section, address the legal obstacles to combating terrorism in the second section, and finally, discuss the international efforts to confront it in the third section.