The 2004 Bridgestone 400 was the twelfth round of the 2004 Bridgestone Presents the Champ Car World Series Powered by Ford season, held on September 25, 2004 at the Las Vegas Motor Speedway in Las Vegas, Nevada.

Patrick Carpentier won the pole, the fifth and final pole of his Champ Car career.

Sébastien Bourdais won the race.

* Alex Tagliani was dropped from 14th to 16th in the final standings and lost his bonus point for leading a lap as a penalty for ignoring a black flag during the race.