| Order / Lane | ATHLETE | COUNTRY | PB | SB 2008 |
|---|---|---|---|---|
| 2 | Thailand Junior |
THA
|
39.66 | 40.16 |
| 3 | Trinidad and Tobago Junior |
TTO
|
39.17 | 40.40 |
| 4 | South Africa Junior |
RSA
|
39.59 | 39.59 |
| 5 | United States Junior |
USA
|
38.66 | 39.37 |
| 6 | Great Britain & N.I. Junior |
GBR
|
39.05 | 39.84 |
| 7 | Jamaica Junior |
JAM
|
39.05 | 39.62 |
| 8 | Chinese Taipei Junior |
TPE
|
40.16 | 40.16 |
| 9 | Japan Junior |
JPN
|
39.30 | 39.95 |