| Order / Lane | ATHLETE | COUNTRY | PB | SB 2018 |
|---|---|---|---|---|
| 1 | Spain U20 |
ESP
|
39.59 | 39.99 |
| 2 | Trinidad and Tobago U20 |
TTO
|
39.17 | 39.67 |
| 3 | Japan U20 |
JPN
|
39.01 | 39.18 |
| 4 | United States U20 |
USA
|
38.66 | 39.49 |
| 5 | Germany U20 |
GER
|
39.13 | 39.13 |
| 6 | Italy U20 |
ITA
|
39.50 | 39.75 |
| 7 | Jamaica U20 |
JAM
|
38.97 | 39.56 |
| 8 | Czech Republic U20 |
CZE
|
39.41 | 39.91 |