The 2004 Backlash was the sixth Backlash professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE). It was held exclusively for wrestlers from the promotion's Raw brand division. The event took place on April 18, 2004, at Rexall Place in Edmonton, Alberta, Canada, thus being the only Backlash event held outside the United States until the 2023 event. The concept of the pay-per-view was based around the backlash from WrestleMania XX.

The main event was a triple threat match for the World Heavyweight Championship involving reigning champion and hometown hero Chris Benoit vs Triple H vs Shawn Michaels, which Benoit won after forcing Michaels to submit to the sharpshooter. One of the predominant matches on the card was Randy Orton versus Cactus Jack in a hardcore match for the WWE Intercontinental Championship. Orton won the match and retained the title after pinning Cactus following an RKO. Another primary match on the undercard was Edge versus Kane, which Edge won by pinfall after executing a spear.