The year 2004 was the 8th year in the history of the Pride Fighting Championships, a mixed martial arts promotion based in Japan. 2004 had 10 events beginning with, Pride 27 - Inferno.

The following fighters fought their first Pride FC fight in 2004:

Pride 27: Inferno was an event held on February 1, 2004 at Osaka-jo Hall in Osaka, Japan.

Pride FC: Bushido 2 was an event held on February 15, 2004 at the Yokohama Arena in Yokohama, Japan.

Pride FC: Total Elimination 2004 was an event held on April 25, 2004 at the Saitama Super Arena in Saitama, Japan. This event consisted of the first round of the 2004 Heavyweight Grand Prix. It took place on April 25, 2004, at the Saitama Super Arena in Saitama, Japan. The Grand Prix tournament continued with Pride: Critical Countdown 2004 and concluded with Pride: Final Conflict 2004.

Pride FC: Bushido 3 was an event held on May 23, 2004 at the Yokohama Arena in Yokohama, Japan.

Pride FC: Critical Countdown 2004 was an event held on June 20, 2004 at the Saitama Super Arena in Saitama, Japan.

Pride FC: Bushido 4 was an event held on July 19, 2004 at the Nagoya Rainbow Hall in Nagoya, Japan.