One Quidditch team in J.K. Rowling’s Harry Potter universe has seven players.
A traditional team consists of three Chasers, two Beaters, one Keeper, and one Seeker. The Chasers try to put the Quaffle through one of three scoring hoops, while the Beaters use bats to redirect Bludgers. The Keeper defends the hoops, and the Seeker pursues the Golden Snitch.
This seven-player structure is central to the fictional sport and explains why Quidditch scenes involve several different jobs at once. The Golden Snitch is worth 150 points in the books, but catching it does not automatically guarantee victory if the opposing team has already built a large lead.
Real-world adaptations of Quidditch have changed some rules and terminology, so readers should distinguish the fictional game from later ground-based sports inspired by it. In Rowling’s original wizarding game, the standard lineup is seven players per side.