2004–05 Primera B Nacional
| Season | 2004–05 |
|---|---|
| Champions | Tiro Federal (1st divisional title) |
| Promoted | Tiro Federal Gimnasia y Esgrima (J) |
| Relegated | Sarmiento (J) Racing (C) Defensores de Belgrano |
| Top goalscorer | AP: Rubén Ramírez 15 goals CL: Héctor Silva 11 goals |
← 2003–04 2005–06 → | |
The 2004–05 Argentine Primera B Nacional was the 19th season of second division professional of football in Argentina. A total of 20 teams competed; the champion and runner-up were promoted to Argentine Primera División.