The 1998 Gerry Weber Open was a men's tennis tournament played on outdoor grass courts. It was the 6th edition of the Gerry Weber Open, and was part of the International Series of the 1998 ATP Tour. It took place at the Gerry Weber Stadion in Halle, Westfalen, Germany, from 8 June through 15 June 1998. Second-seeded Yevgeny Kafelnikov won his second consecutive singles title at the event.
See main article: 1998 Gerry Weber Open – Singles. 
Yevgeny Kafelnikov defeated 
Magnus Larsson 6–4, 6–4
See main article: 1998 Gerry Weber Open – Doubles. Ellis Ferreira / 
Rick Leach defeated John-Laffnie de Jager / Marc-Kevin Goellner 4–6, 6–4, 7–6