2009–10 Primera B Nacional
| Season | 2009–10 |
|---|---|
| Champions | Olimpo (3rd divisional title) |
| Promoted | Olimpo Quilmes All Boys |
| Relegated | Platense Sportivo Italiano |
| Top goalscorer | Leandro Armani (19 goals) |
← 2008–09 2010–11 → | |
The 2009–10 Argentine Primera B Nacional was the 24th 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.