Facchetti made his debut for Italy on 23 March 1963, in a 1–0 away win in a European qualifier against Turkey. He was capped 94 times (a record at the time, since overtaken only by Dino Zoff, Paolo Maldini, Fabio Cannavaro and Gianluigi Buffon) wearing the captain's armband 70 times and scoring three goals between 1963 and 1977; he is currently his nation's ninth-highest appearance holder. He played for his country at the 1966, 1970, and 1974 FIFA World Cups, captaining Italy in the latter two editions of the tournament. Facchetti also captained the Italian squad to victory at Euro 1968, wearing the number 10 shirt, after advancing to the finals by calling the coin toss correctly following extra time against the Soviet Union, before winning the final over Yugoslavia 2–0 in the replay match, as well as being named to the Team of the Tournament. He was also named to the Team of the Tournament in the 1970 World Cup, where he helped his team to the final of the tournament, only to be defeated 4–1 by Brazil.