The 2006 Campeonato Brasileiro Série A was the 50th edition of the Campeonato Brasileiro Série A. It began on April 15, 2006, and reached its end on December 3, 2006.
The format was similar to the 2005 edition, though fielding two fewer teams. 20 teams competed, each team playing the other in a home-and-away format. At the season finale, the team with the most accumulated points (3 for each win, 1 for a draw, none for a loss) was declared champion.
From April 15 through June 4, 10 rounds were played. From June 9 until July 9, the tournament was suspended for the FIFA World Cup 2006. Play resumed on July 12 and continued until December 3.
Several teams had their attentions divided between other tournaments over the same duration: