Makruk (or Thai chess) is a board game descended from the 6th century Indian game of chaturanga or a close relative thereof, and therefore related to chess. It is regarded as the most similar living game to this common ancestor of all chess variants.

The name makruk is expressed with a low-shaking tone while saying mak and a high-level tone when saying ruk. Makruk is popular in Thailand and Cambodia. In these countries the game is more popular than chess. There are around two millions Thais who can play Makruk, of which about 5000 also play chess.