The September 23, 2004 Edition of Smackdown is a Professional wrestling television show of World Wrestling Entertainment, which took place on September 21, 2004 at the America West Arena in Phoenix, Arizona. This episode marked as the 5th Anniversary celebration of SmackDown.
- Numbers in parentheses indicate the length of the match.
- (c) refers to the champion(s) heading into the match.
- Booker T defeated Paul London (3:10)
- Spike Dudley (c) defeated Rey Mysterio to retain the WWE Cruiserweight Championship (8:15)
- The Undertaker defeated Gangrel & Viscera in a Two On One Handicap Match (2:35)
- Mae Young & The Fabulous Moolah defeated Dawn Marie & Torrie Wilson (3:39)
- Eddie Guerrero & Big Show vs. Kurt Angle & Luther Reigns - No Contest (12:30)