The National Olympic Committees (NOCs) are the IOC’s territorial representatives. They are however independent organizations under the laws of their own territory. Their main responsibility is to select and send a team for the Olympic Games. Before discovering the thrust of their mission, we explain how an NOC can be recognized by the IOC and thus enter the Olympic system. The final section of this chapter presents Olympic Solidarity, an IOC department dedicated to helping the NOCs fulfill their mission and that is funded by about one-third of the broadcasting rights of the Olympic Games.