AAA World Cruiserweight Champion

The AAA World Cruiserweight Championship (Campeonato Mundial Crucero AAA in Spanish) is a professional wrestling championship contested for in the Mexican lucha libre promotion Lucha Libre AAA Worldwide (AAA). The championship cannot be competed for by anyone who is over the Cruiserweight division weight limit of 105 kg (231 lb) and below. Traditionally this division is labelled as the "Junior Heavyweight" division in Mexico while "Cruiserweight" is a term more used in the United States or Canada.

The championship was originally named the AAA Cruiserweight Championship. but had the word "world" added to the name after El Hijo del Fantasma won a match on August 17, 2014, that unified the championship with the AAA Fusión Championship. A total of seven men have held the championship for a total of nine different title reigns. Lanzelot is the current champion in his first reign.

The inaugural champion was Alex Koslov, who defeated Alan Stone and Xtreme Tiger at AAA Television Taping on May 21, 2009, in Aguascalientes, Aguascalientes. The longest reigning champion was Jack Evans who held the title for 713 days from June 6, 2010, to May 19, 2012. The youngest champion is Daga who won at the age of 24 years and 136 days. The shortest reigning champion was Alex Koslov who held the title for 9 days from August 21, 2009 to August 30, 2009. Alex Koslov and Xtreme Tiger has held the title the most times with 2 championship reigns. The oldest champion is Juventud Guerrera who won at the age of 37 years and 178 days. The current champion is Lanzelot, who is in his first reign. He defeated previous champion Johnny Mundo as well as eight other men at Héroes Inmortales XI on October 1, 2017, to win the title.