| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|---|
| 1 | 1 | 1 | Great Britain & NI |
GBR |
41.55 Q NR | |
| 2 | 2 | 1 | United States |
USA |
41.90 Q SB | |
| 3 | 1 | 2 | Germany |
GER |
42.00 Q SB | |
| 4 | 2 | 2 | Switzerland |
SUI |
42.05 Q NR | |
| 5 | 3 | 1 | Jamaica |
JAM |
42.15 Q SB | |
| 6 | 4 | 1 | France |
FRA |
42.68 q SB | |
| 7 | 5 | 1 | Netherlands |
NED |
42.81 q SB | |
| 8 | 3 | 2 | PR of China |
CHN |
42.82 Q | |
| 9 | 6 | 1 | Italy |
ITA |
42.84 NR | |
| 10 | 4 | 2 | Poland |
POL |
43.09 SB | |
| 11 | 5 | 2 | Brazil |
BRA |
43.15 SB | |
| 12 | 6 | 2 | Nigeria |
NGR |
43.25 | |
| 13 | 7 | 1 | Japan |
JPN |
43.44 SB | |
| 14 | 7 | 2 | Denmark |
DEN |
43.51 NR | |
| 15 | 8 | 2 | Trinidad and Tobago |
TTO |
43.62 SB | |
| 16 | 8 | 1 | Ecuador |
ECU |
43.69 NR |