The 1998 Monte Carlo Open was a tennis tournament played on outdoor clay courts. It was the 92nd edition of the Monte Carlo Open, and was part of the ATP Masters Series of the 1998 ATP Tour. It took place at the Monte Carlo Country Club in Roquebrune-Cap-Martin, France, near Monte Carlo, Monaco, from April 20 through April 26, 1998.
The men's field was headlined by. Other top seeds in the field were.
Carlos Moyá def. Cédric Pioline, 6–3, 6–0, 7–5
- It was Carlos Moyá's 1st title of the year, and his 4th overall. It was his 1st Masters title of the year, and overall.
Jacco Eltingh / Paul Haarhuis def. Todd Woodbridge / Mark Woodforde, 6–4, 6–2