| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2016 | 
|---|---|---|---|---|---|
| 2 | POL | Poland U20 |  POL | 39.31 | 39.98 | 
| 3 | USA | United States U20 |  USA | 38.66 | 39.20 | 
| 4 | JPN | Japan U20 |  JPN | 39.01 | 39.53 | 
| 5 | AUS | Australia U20 |  AUS | 39.34 | 39.62 | 
| 6 | GBR | Great Britain and N.I. U20 |  GBR | 39.05 | 39.91 | 
| 7 | GER | Germany U20 |  GER | 39.25 | 39.69 | 
| 8 | ITA | Italy U20 |  ITA | 39.61 | 40.13 | 
| 9 | JAM | Jamaica U20 |  JAM | 38.97 | 39.74 |