The 1998–99 Divizia B was the 59th season of the second tier of the Romanian football league system. The format has been maintained to two series, each of them having 18 teams. At the end of the season, the winners of the series promoted to Divizia A and the last three places from both series relegated to Divizia C. A promotion play-off was played between the runners-up of the series to decide the third team that promoted to Divizia A.

Team changes

To Divizia B

Promoted from Divizia C Relegated from Divizia A

From Divizia B

Relegated to Divizia C Promoted to Divizia A

Renamed teams

Electroputere Craiova was renamed as Extensiv Craiova. Maramureș Baia Mare was renamed as FC Baia Mare.

League tables

Seria I

Seria II

Promotion play-off

The 2nd-placed teams of the Divizia B played a match to decide the third team promoted to Divizia A. The match was played on neutral ground, on the Cetate Stadium in Alba Iulia.

Top scorers