| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2004 | 
|---|---|---|---|---|---|
| 1 | 65 | Michaël Bultheel |  BEL | 51.46 | 51.46 | 
| 2 | 93 | Diego Venâncio |  BRA | 50.39 | 50.39 | 
| 3 | 168 | Yasser Lismet |  CUB | 49.72 | 49.72 | 
| 4 | 919 | VÃctor Solarte |  VEN | 51.14 | 51.14 | 
| 5 | 278 | Richard Davenport |  GBR | 51.08 | 51.08 | 
| 6 | 496 | Ibrahim Al-Hamaidi |  KSA | 49.81 | 49.81 | 
| 7 | 407 | Nicola Cascella |  ITA | 51.47 | 51.47 | 
| 8 | 428 | Markino Buckley |  JAM | 52.03 | 52.03 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2004 | 
|---|---|---|---|---|---|
| 1 | 508 | Bandar Yahya Shraheli |  KSA | 51.57 | 51.57 | 
| 2 | 453 | Go Tanabe |  JPN | 51.33 | 51.43 | 
| 3 | 884 | Brandon Johnson |  USA | 48.85 | 48.85 | 
| 4 | 696 | L.J. van Zyl |  RSA | 48.89 | 49.71 | 
| 5 | 868 | Kerron Clement |  USA | 48.77 | 48.77 | 
| 6 | 686 | Wouter le Roux |  RSA | 49.45 | 49.45 | 
| 7 | 742 | El Hadji Sethe Mbow |  SEN | 50.78 | 50.78 | 
| 8 | 236 | Teemu Linkosaari |  FIN | 51.56 | 51.56 |