The 1998 Investor Swedish Open was a men's tennis tournament played on outdoor clay courts in Båstad, Sweden that was part of the World Series of the 1998 ATP Tour.

It was the 51st edition of the tournament and was held from 6 July until 12 July 1998.

First-seeded Magnus Gustafsson won the singles title.

[3] Magnus Gustafsson defeated Andriy Medvedev, 6–2, 6–3 Magnus Gustafsson / Magnus Larsson defeated Lan Bale / Piet Norval, 6–4, 6–2