| 2003–04 OK Liga | |
| Sport: | Roller hockey |
| League: | OK Liga |
| Second Place: | Barna Work Igualada |
| Relegate To: | Primera División |
| Relegate: | Cibeles Deasa Alcobendas Tordera |
| Seasonslistnames: | OK Liga |
| Prevseason Link: | 2002–03 OK Liga |
| Prevseason Year: | 2002–03 |
| Nextseason Link: | 2004–05 OK Liga |
| Nextseason Year: | 2004–05 |
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: [1]
| width=30 | ! | Team | Qualification or relegation |
|---|---|---|---|
| 1 | CERH European League | ||
| 2 | Barna Work Igualada | ||
| 3 | Alnimar Reus Deportiu | ||
| 4 | Liceo Vodafone | ||
| 5 | CERS Cup | ||
| 6 | Roncato Vic | ||
| 7 | Grup Castillo Lleida | ||
| 8 | |||
| 9 | Viva Hàbitat Blanes | ||
| 10 | Leche Celta Voltregà | ||
| 11 | Vilanova L'Ull Blau | ||
| 12 | Lloret | ||
| 13 | Aiscondel Vila-seca | ||
| 14 | Relegation to Primera División | ||
| 15 | Alcobendas | ||
| 16 | Tordera |
| Tourney Name: | Copa del Rey |
| Year: | 2004 |
| Dates: | 25–28 March 2004 |
| Arena: | Jerez de la Frontera |
| Champion: | Liceo Vodafone |
| Second: | Barna Work Igualada |
| Prevseason: | 2003 |
| Nextseason: | 2005 |
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.