The 2004 Generali Open was a men's tennis tournament played on outdoor clay courts at the Tennis Stadium Kitzbühel in Kitzbühel, Austria and was part of the International Series Gold of the 2004 ATP Tour. It was the 49th edition of the tournament and ran from 19 July until 25 July 2004. Third-seeded Nicolás Massú won the singles title.
See main article: 2004 Generali Open – Singles. Nicolás Massú defeated 
Gastón Gaudio 7–6(7–3), 6–4
See main article: 2004 Generali Open – Doubles. 
František Čermák / Leoš Friedl defeated Lucas Arnold Ker / Martín García 6–3, 7–5