Ariq Böke (after 1219–1266), the components of his name also spelled Arigh, Arik, Bukha, Buka, is the youngest son of Tolui (1192–1232), a son of Genghis Khan.

After the death of his brother the Great Khan Möngke, Ariq Böke briefly takes power while his brothers Kublai (more commonly known as Kublai Khan) and Hulagu (or Hulagu) are absent.

When Kublai returns for an election in 1260.

Rival factions cannot agree, and elect simultaneous claimants Kublai and Ariq Böke to the throne, resulting in a war for succession which marks the beginning of civil war in the Mongol Empire.

Ariq Böke is supported by the traditionalists of the Mongol Empire, while his brother Kublai Khan is supported by the senior princes of North China and Manchuria.