The 2003–04 OK Liga was the 35th season of the top-tier league of rink hockey in Spain.
Barcelona Excelent finished the league as champion.
Sixteen teams joined the league.
The eight first teams at the end of the regular season qualified for the playoffs while the three last teams were relegated to Primera División.
All series were played with a best-of-five series.
Seeded teams played games 1, 2 and 5 of the series at home.
Source: [2]
The 2004 Copa del Rey was the 61st edition of the Spanish men's roller hockey cup. It was played in Reus between the eight first qualified teams after the first half of the season.
Liceo Vodafone won its ninth title, the first one since 1997.