In diplomacy and international relations, shuttle diplomacy is the use of a third party to serve as an intermediary or mediator between two parties who do not talk directly. The third party traveled frequently back and forth (that is, "shuttles") between the two primary parties. Shuttle diplomacy is often used when the two primary parties do not formally recognize each other but still want to negotiate.

The term shuttle diplomacy became widespread following Henry Kissinger's term as Secretary of State. Kissinger participated in shuttle diplomacy in the Middle East and in the People's Republic of China.