2005–06 Primera B Nacional
| Season | 2005–06 |
|---|---|
| Champions | Godoy Cruz (1st divisional title) |
| Promoted | Godoy Cruz Nueva Chicago Belgrano |
| Relegated | El Porvenir Juventud Antoniana San Martín (M) |
| Top goalscorer | AP: Daniel Bazán Vera 15 goals CL: Rubén Ferrer 10 goals |
← 2004–05 2006–07 → | |
The 2005–06 Argentine Primera B Nacional was the 20th 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.