# Athletics at the 2010 Summer Youth Olympics – Boys' 400 metres

The boys' 400 metres competition at the 2010 Youth Olympic Games was held on 17–21 August 2010 in Bishan Stadium.

## Schedule

| Date | Time | Round |
| 17 August 2010 | 11:30 | Heats |
| 21 August 2010 | 09:50 | Final |

## Records

Prior to the competition, the following records were as follows.
| World Youth Best | Obea Moore (USA) | 45.14 | Santiago, Chile | 2 September 1995 |
| Championship Record | None | None | None | None |
| World Youth Leading | Luguelín Santos (DOM) | 46.19 | Santo Domingo, DOM | 26 June 2010 |
No new records were set during the competition.

## Results
### Heats

| Rank | Heat | Lane | Athlete | Time | Notes | Q |
| 1 | 4 | 5 | Luguelín Santos (DOM) | 46.82 | | FA |
| 2 | 2 | 4 | Lukas Schmitz (GER) | 47.27 | | FA |
| 3 | 3 | 3 | Sadam Elnour (SUD) | 47.37 | | FA |
| 4 | 1 | 3 | Nikita Uglov (RUS) | 47.43 | | FA |
| 5 | 4 | 4 | Ruan Greyling (RSA) | 47.60 | PB | FA |
| 6 | 3 | 5 | Alphas Kishoyian (KEN) | 47.79 | | FA |
| 7 | 1 | 4 | Najee Glass (USA) | 47.83 | | FA |
| 8 | 3 | 4 | Leandro de Araújo (BRA) | 48.23 | | FA |
| 9 | 2 | 5 | Marco Lorenzi (ITA) | 48.40 | | FB |
| 10 | 1 | 6 | Shaquille Alleyne (BAR) | 48.68 | | FB |
| 11 | 3 | 6 | Golden Gunde (MAW) | 48.68 | =PB | FB |
| 12 | 1 | 5 | Simon Lawrence (DMA) | 48.82 | | FB |
| 13 | 2 | 6 | Sebastian Wiszniewski (POL) | 48.83 | | FB |
| 14 | 2 | 3 | Abdullah Ahmed Abkar (KSA) | 49.18 | | FB |
| 15 | 4 | 3 | Choi Dong-baek (KOR) | 49.20 | | FB |
| 16 | 4 | 7 | Luke Greco (AUS) | 50.82 | | FC |
| 17 | 1 | 7 | Fousseyni Tamboura (MLI) | 50.96 | | FC |
| 18 | 3 | 2 | Omar Ceesay (GAM) | 52.09 | | FC |
| 19 | 4 | 6 | Lennox Williams (JAM) | 52.27 | | FC |
| 20 | 2 | 2 | Jimmy Thoronka (SLE) | 52.83 | | FC |
| 21 | 4 | 8 | Jalil Salmon (ANT) | 53.55 | | FC |
| 22 | 1 | 2 | Davy Julien Edou (GAB) | 53.59 | | FC |
| 23 | 2 | 7 | David Walter (ISV) | 53.90 | | FD |
| 24 | 4 | 2 | Stanley Sipolo (SOL) | 54.53 | | FD |
| 25 | 3 | 7 | Michael Gaitan (GUM) | 55.07 | | FD |
| 26 | 1 | 1 | Maima Moiya (TUV) | 1:03.28 | | FD |
| | 1 | 8 | Yorghena Embole Mokulu (COD) | DNF | | FD |
| | 2 | 8 | Rosen Daniel (LCA) | DNF | | FD |
| | 3 | 8 | Djato Emmanuel (CHA) | DSQ | | FD |

### Finals
#### Final A

| Rank | Lane | Athlete | Time | Notes |
| | 6 | Luguelín Santos (DOM) | 47.11 | |
| | 8 | Ruan Greyling (RSA) | 47.22 | PB |
| | 7 | Alphas Kishoyian (KEN) | 47.24 | PB |
| 4 | 4 | Sadam Elnour (SUD) | 47.32 | |
| 5 | 2 | Leandro de Araújo (BRA) | 47.59 | PB |
| 6 | 1 | Najee Glass (USA) | 47.65 | |
| 7 | 3 | Nikita Uglov (RUS) | 48.15 | |
| 8 | 5 | Lukas Schmitz (GER) | 48.70 | |

#### Final B

| Rank | Lane | Athlete | Time | Notes |
| 1 | 5 | Marco Lorenzi (ITA) | 48.31 | |
| 2 | 3 | Shaquille Alleyne (BAR) | 48.35 | |
| 3 | 6 | Choi Dong-baek (KOR) | 48.42 | PB |
| 4 | 8 | Sebastian Wiszniewski (POL) | 48.45 | |
| 5 | 7 | Abdullah Ahmed Abkar (KSA) | 48.51 | |
| 6 | 6 | Golden Gunde (MAW) | 48.71 | |
| 7 | 4 | Simon Lawrence (DMA) | 49.26 | |

#### Final C

| Rank | Lane | Athlete | Time | Notes |
| 1 | 4 | Omar Ceesay (GAM) | 50.07 | SB |
| 2 | 6 | Luke Greco (AUS) | 50.76 | |
| 3 | 3 | Fousseyni Tamboura (MLI) | 51.01 | |
| 4 | 7 | Jalil Salmon (ANT) | 52.58 | |
| 5 | 2 | Davy Julien Edou (GAB) | 54.15 | |
| | 8 | Jimmy Thoronka (SLE) | DSQ | |
| | 5 | Lennox Williams (JAM) | DNS | |

#### Final D

| Rank | Lane | Athlete | Time | Notes |
| 1 | 2 | Djato Emmanuel (CHA) | 51.03 | SB |
| 2 | 8 | Yorghena Embole Mokulu (COD) | 51.24 | |
| 3 | 3 | David Walter (ISV) | 52.50 | |
| 4 | 6 | Michael Gaitan (GUM) | 55.20 | |
| | 4 | Stanley Sipolo (SOL) | DNS | |
| | 7 | Rosen Daniel (LCA) | DNS | |
| | 5 | Maima Moiya (TUV) | DNS | |