The 2004 BMW Open was a men's tennis tournament played on outdoor clay courts in Munich, Germany and was part of the International Series of the 2004 ATP Tour.

The tournament ran from 26 April until 2 May 2004.

Unseeded Nikolay Davydenko won the singles title.

Nikolay Davydenko defeated Martin Verkerk 6–4, 7–5 James Blake / Mark Merklein defeated Julian Knowle / Nenad Zimonjić 6–2, 6–4