The title Grandmaster is awarded to chess players by the world chess organization FIDE. Apart from World Champion, Grandmaster is the highest title a chess player can attain.

Once achieved, the title is held for life. In chess literature it is usually abbreviated to GM. (Other titles are also often abbreviated: FM for FIDE Master, IM for International Master, and CM for Candidate Master.) The abbreviation IGM for International Grandmaster is also sometimes used, particularly in older literature.