Grand Slam Champion, or Grand Slam Champions are names usually given to a person or team that has won every title or tournament.

The title is usually used to describe WWF/WWE wrestler Shawn Michaels who in 1997 won the WWE European Championship making him the first ever Grand Slam Champion. Despite the creation of the Hardcore and Light-Heavyweight titles later on, Michaels remains a Grand Slam Champion.

In early 2001 Triple H became the 2nd Grand Slam Champion when he won the World Tag Team titles with Steve Austin. Further Grand Champions in the WWE include Kurt Angle, Chris Jericho, Eddie Guerrero and Chris Benoit, who have won the "Four Major WWE Titles", WWE/World Heavyweight, Intercontinental, European and Tag Team.