| Order / Lane | ATHLETE | COUNTRY | PB | SB 2004 | 
|---|---|---|---|---|
| Ireland Junior |  IRL | 45.13 | 45.13 | |
| 2 | United States Junior |  USA | 43.38 | 44.05 | 
| 3 | Italy Junior |  ITA | 44.89 | 46.17 | 
| 4 | South Africa Junior |  RSA | 45.07 | 46.39 | 
| 6 | Japan Junior |  JPN | 44.90 | 46.01 | 
| 7 | Poland Junior |  POL | 44.59 | 45.27 | 
| Order / Lane | ATHLETE | COUNTRY | PB | SB 2004 | 
|---|---|---|---|---|
| 2 | Australia Junior |  AUS | 44.94 | 44.94 | 
| 3 | Norway Junior |  NOR | 46.04 | 47.68 | 
| 4 | Switzerland Junior |  SUI | 45.20 | 45.98 | 
| 5 | Trinidad and Tobago Junior |  TTO | 44.44 | 44.44 | 
| 6 | Mexico Junior |  MEX | 47.40 | |
| 7 | Ukraine Junior |  UKR | 45.53 | 45.53 | 
| Order / Lane | ATHLETE | COUNTRY | PB | SB 2004 | 
|---|---|---|---|---|
| 2 | Finland Junior |  FIN | 44.40 | 45.55 | 
| 3 | Canada Junior |  CAN | 44.88 | |
| 4 | France Junior |  FRA | 43.9 | 44.70 | 
| 5 | Sweden Junior |  SWE | 44.78 | 45.47 | 
| 6 | Germany Junior |  GER | 43.91 | 44.75 | 
| 7 | Jamaica Junior |  JAM | 43.40 | 44.26 |