The 2004 Dutch Open, also known by its sponsored name Priority Telecom Open, was an ATP men's tennis tournament staged on outdoor clay courts in Amersfoort, Netherlands and part of the International Series of the 2004 ATP Tour. It was the 47th edition of the tournament and was held from 12 July until 18 July 2004. Fourth-seeded Martin Verkerk won his first event of the year, and the second title of his professional career.
See main article: 2004 Dutch Open – Singles. Martin Verkerk defeated Fernando González 7–6(7–5), 4–6, 6–4
See main article: 2004 Dutch Open – Doubles. 
Jaroslav Levinský / David Škoch defeated 
José Acasuso / 
Luis Horna 6–0, 2–6, 7–5