| Competition: | Belarusian First League |
| Season: | 2004 |
| Winners: | Lokomotiv Minsk |
| Promoted: | Lokomotiv Minsk |
| Relegated: | Molodechno-2000 Vertikal Kalinkovichi Dinamo-Juni Minsk |
| Matches: | 240 |
| Total Goals: | 577 |
| Prevseason: | 2003 |
| Nextseason: | 2005 |
2004 Belarusian First League was the 14th season of 2nd level football championship in Belarus. It started in April and ended in November 2004.
Two top teams of last season (Lokomotiv Vitebsk and MTZ-RIPO Minsk) were promoted to Belarusian Premier League. They were replaced by two teams that finished at the bottom of 2003 Belarusian Premier League table (Lokomotiv Minsk and Molodechno-2000).
Two teams that finished at the bottom of 2003 season table (Neman Mosty and Pinsk-900) relegated to the Second League. They were replaced by two best teams of 2003 Second League (Baranovichi and Veras Nesvizh).
| width=120 | Team | width=110 | Location | data-sort-type="number" | Position in 2003 |
|---|---|---|---|---|---|
| Lokomotiv | Minsk | Premier League, 15 | |||
| Molodechno-2000 | Molodechno | Premier League, 16 | |||
| Smorgon | Smorgon | 3 | |||
| Vedrich-97 | Rechitsa | 4 | |||
| Granit | Mikashevichi | 5 | |||
| ZLiN | Gomel | 6 | |||
| Khimik | Svetlogorsk | 7 | |||
| Lida | Lida | 8 | |||
| Torpedo-Kadino | Mogilev | 9 | |||
| Kommunalnik | Slonim | 10 | |||
| Dnepr-DUSSh-1 | Rogachev | 11 | |||
| Dinamo-Juni | Minsk | 12 | |||
| Vertikal | Kalinkovichi | 13 | |||
| Bereza | Bereza | 14 | |||
| Baranovichi | Baranovichi | Second League, 1 | |||
| Veras | Nesvizh | Second League, 2 |
| Rank | width=170 | Goalscorer | width=170 | Team | Goals |
|---|---|---|---|---|---|
| 1 | Aleksei Martynov | Lokomotiv Minsk | 19 | ||
| 2 |  Mihail Litvinchuk | Lokomotiv Minsk | 16 | ||
| Dzmitry Vyarstak | Smorgon | 16 | |||
| 4 | Sergey Krivets | Lokomotiv Minsk | 12 | ||
| Mihail Eramchuk | Vedrich-97 Rechitsa | 12 | |||
| Dmitry Gavrilovich | Veras Nesvizh | 12 |