The 2004 Monte Carlo Masters was a tennis tournament played on outdoor clay courts. It was the 98th edition of the Monte Carlo Masters and was part of the Masters Series of the 2004 ATP Tour. It took place at the Monte Carlo Country Club in Roquebrune-Cap-Martin in France from April 19 through April 25, 2004.
Guillermo Coria defeated Rainer Schüttler 6–2, 6–1, 6–3
- It was Coria's 2nd title of the year and the 8th of his career. It was his 1st Masters title of the year and his 1st overall.
Tim Henman / Nenad Zimonjić defeated Gastón Etlis / Martin Rodríguez 7–5, 6–2
- It was Henman's only title of the year and the 15th of his career. It was Zimonjić's only title of the year and the 8th of his career.