Fourball, also known as better ball or best ball, is a pairs playing format in the game of golf. In a fourball competition, two golfers form a team and each plays their own ball throughout the round. The teams score on each hole is the lower of the two players scores, and only one of the pair is required to complete each hole. The winners are the team with the lowest aggregate score over a set number of holes.

Fourball can be played in both stroke play and match play competitions. In match play, two teams of two players compete directly against each other, and each hole is won by the team whose member has the lowest score. This form of golf is commonly played in team golf competitions such as the Ryder Cup, Solheim Cup, and Presidents Cup.

Under the World Handicap System, each player gets 85% of handicap allowance in fourball stroke play or Stableford competitions, and 90% in fourball match play. Although each player has to play their own ball, in several respects the players are treated as the same player. Thus a player may, for example, mark his partner’s ball, or lift and clean it, or drop it under penalty.