The 2004 Ordina Open was a tennis tournament played on grass courts in Rosmalen, 's-Hertogenbosch in the Netherlands that was part of the International Series of the 2004 ATP Tour and of Tier III of the 2004 WTA Tour. The tournament was held from 14 June until 20 June 2004. Michaël Llodra and Mary Pierce won the singles titles.
See main article: 2004 Ordina Open – Men's singles. 
Michaël Llodra defeated 
Guillermo Coria 6–3, 6–4
See main article: 2004 Ordina Open – Women's singles. Mary Pierce defeated Klára Koukalová 7–6(8–6), 6–2
See main article: 2004 Ordina Open – Men's doubles. 
Martin Damm / Cyril Suk defeated Lars Burgsmüller / Jan Vacek 6–3, 6–7(7–9), 6–3
See main article: 2004 Ordina Open – Women's doubles. 
Lisa McShea / 
Milagros Sequera defeated Jelena Kostanić / 
Claudine Schaul 7–6(7–3), 6–3