This thesis deals with the presumption that multilateral diplomacy is a possible means to promote good governance. The first part described the origin, definition and criticism of the concept of good governance. Another part deals with transformations of diplomacy and international relations after the Cold War. Contemporary diplomacy must respond to globalization, interdependence, technological development, changing international environment and increase the number of actors in international relations. The last part is devoted to multilateral diplomacy, international organizations and especially their connection with good governance. In my thesis I came to the conclusion that multilateral diplomacy can be a useful tool for promoting the objectives of good governance and management of the state. The best space for the use of multilateral diplomacy as a means of promoting good governance is intergovernmental organization.