K-1 Grand Prix '98 final round was a martial arts event promoted by the K-1.

The eight finalists had all qualified via elimination fights at the K-1 World Grand Prix '98 opening round.

Also on the card was a number of 'Freshman Fights' fought under a mixture of Jiu-Jitsu Freestyle and K-1 rules (various weight classes).

The tournament winner was Peter Aerts who won his third K-1 Grand Prix final by defeated Andy Hug by way of first round knockout.

Andy would be making his third consecutive final appearance, having won it in 1996 and been runner up the following year.