400mH BOYS FINAL ; Official result since 15:38
| Rank | Lane | ID | Name | SB | Team | Cat | Result | Info | Video |
| 1 | 8 | 180 | COROLLER Victor | 54.69 | FRA | Youth | 52.85 | ||
| 2 | 3 | 13 | HUFNAGL Dominik | 53.99 | AUT | Youth | 52.95 | ||
| 3 | 4 | 399 | LOGINOV Ivan | 54.00 | RUS | Youth | 53.19 | ||
| 4 | 7 | 205 | LEVANTINOS Dimitris | 54.46 | GRE | Youth | 53.39 | ||
| 5 | 6 | 351 | GALIKOWSKI Michal | 53.94 | POL | Youth | 53.44 | ||
| 6 | 5 | 359 | PRAZERES NETO Paulo | 54.16 | POR | Youth | 55.01 | ||
| 7 | 1 | 96 | SKLENAR David | 55.72 | CZE | Youth | 55.19 | ||
| 8 | 2 | 85 | VASILEIOU Anastasios | 54.84 | CYP | Youth | 1:02.72 |