| Competition: | Serie B |
| Season: | 1998–99 |
| Promoted: | Verona (3rd title) Torino Lecce Reggina |
| Relegated: | Reggiana Fidelis Andria Lucchese Cremonese |
| League Topscorer: | Marco Ferrante (26 goals) |
| Matches: | 380 |
| Total Goals: | 865 |
| Prevseason: | 1997–98 |
| Nextseason: | 1999–2000 |
The Serie B 1998–99 was the sixty-seventh tournament of this competition played in Italy since its creation.
Cesena, Cremonese, Cosenza and Ternana had been promoted from Serie C, while Brescia, Atalanta, Lecce and Napoli had been relegated from Serie A.
