| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2006 | 
|---|---|---|---|---|---|
| 1 | 33 | Mariyana Dimitrova |  BUL | 51.20o | 52.07 | 
| 2 | 155 | Novlene Williams-Mills |  JAM | 50.59o | 51.25 | 
| 3 | 7 | Christine Amertil |  BAH | 50.09o | 51.09 | 
| 4 | 234 | Natalya Nazarova |  RUS | 49.65o | 49.98 | 
| 5 | 32 | Vania Stambolova |  BUL | 50.58 | 50.58 | 
| 6 | 229 | Olesya Krasnomovets |  RUS | 50.04 | 50.04 |