# 2000 World Junior Championships in Athletics – Men's 400 metres

The men's 400 metres event at the 2000 World Junior Championships in Athletics was held in Santiago, Chile, at Estadio Nacional Julio Martínez Prádanos on 17, 18 and 20 October.

## Medalists

| Gold | Hamdan Al-Bishi Saudi Arabia |
| Silver | Brandon Simpson Jamaica |
| Bronze | Shinji Ishikawa Japan |

## Results
### Final

20 October
| Rank | Name | Nationality | Time |
| | Hamdan Al-Bishi | Saudi Arabia | 44.66 |
| | Brandon Simpson | Jamaica | 45.73 |
| | Shinji Ishikawa | Japan | 45.77 |
| 4 | Damion Barry | Trinidad and Tobago | 45.86 |
| 5 | William Hernández | Venezuela | 45.94 |
| 6 | Richard Sharp | South Africa | 45.97 |
| 7 | Jonathan Palma | Venezuela | 46.36 |
| 8 | Rafał Wieruszewski | Poland | 46.37 |

### Semifinals

18 October

#### Semifinal 1

| Rank | Name | Nationality | Time | Notes |
| 1 | Damion Barry | Trinidad and Tobago | 46.63 | Q |
| 2 | Rafał Wieruszewski | Poland | 46.66 | Q |
| 3 | Shinji Ishikawa | Japan | 46.99 | Q |
| 4 | Jonathan Palma | Venezuela | 47.10 | Q |
| 5 | Tshepo Thobelangope | South Africa | 47.18 | |
| 6 | Gordon Kennedy | Ireland | 47.37 | |
| 7 | Bastian Swillims | Germany | 47.43 | |
| 8 | Vladimir Demchenko | Ukraine | 47.54 | |

#### Semifinal 2

| Rank | Name | Nationality | Time | Notes |
| 1 | Hamdan Al-Bishi | Saudi Arabia | 45.69 | Q |
| 2 | Brandon Simpson | Jamaica | 45.96 | Q |
| 3 | William Hernández | Venezuela | 46.77 | Q |
| 4 | Richard Sharp | South Africa | 46.83 | Q |
| 5 | Sherridan Kirk | Trinidad and Tobago | 47.08 | |
| 6 | Shinji Itabashi | Japan | 47.67 | |
| 7 | Bruno Ediarimalala | Madagascar | 47.91 | |
| 8 | James Graham | United States | 49.64 | |

### Heats

17 October

#### Heat 1

| Rank | Name | Nationality | Time | Notes |
| 1 | Hamdan Al-Bishi | Saudi Arabia | 46.63 | Q |
| 2 | Gordon Kennedy | Ireland | 46.94 | Q |
| 3 | Jonathan Palma | Venezuela | 47.27 | q |
| 4 | Mark Ormrod | Australia | 47.66 | |
| 5 | Richard Petzold | Germany | 48.96 | |
| 6 | David Neilsen | Guam | 49.99 | |
| 7 | Melville Rogers | Saint Kitts and Nevis | 51.18 | |

#### Heat 2

| Rank | Name | Nationality | Time | Notes |
| 1 | Brandon Simpson | Jamaica | 46.64 | Q |
| 2 | Bastian Swillims | Germany | 47.06 | Q |
| 3 | David Melo | Spain | 47.96 | |
| 4 | Marcelo Figueroa | El Salvador | 47.99 | |
| 5 | Alexis Roberts | Bahamas | 49.02 | |
| 6 | Liu Yuan-Kai | Chinese Taipei | 49.06 | |
| | Japheth Ogamba | Kenya | DQ | IAAF rule 163.3 |

#### Heat 3

| Rank | Name | Nationality | Time | Notes |
| 1 | Damion Barry | Trinidad and Tobago | 46.62 | Q |
| 2 | Tshepo Thobelangope | South Africa | 46.81 | Q |
| 3 | Bruno Ediarimalala | Madagascar | 46.83 | q |
| 4 | Urel Lacroix | France | 47.34 | |
| 5 | Dmitriy Petrov | Russia | 47.66 | |
| 6 | Jesús Torres | Puerto Rico | 48.58 | |
| 7 | Khalid Brooks | Anguilla | 53.09 | |
| | Sándor Gombos | Hungary | DQ | IAAF rule 163.3 |

#### Heat 4

| Rank | Name | Nationality | Time | Notes |
| 1 | William Hernández | Venezuela | 46.52 | Q |
| 2 | Rafał Wieruszewski | Poland | 46.64 | Q |
| 3 | Vladimir Demchenko | Ukraine | 47.10 | q |
| 4 | Cameron Brown | Australia | 47.36 | |
| 5 | Florin Suciu | Romania | 47.44 | |
| 6 | Nathan Justin | Saint Lucia | 49.66 | |
| 7 | Shane Ogumoro | Northern Mariana Islands | 56.72 | |

#### Heat 5

| Rank | Name | Nationality | Time | Notes |
| 1 | Shinji Itabashi | Japan | 47.37 | Q |
| 2 | James Graham | United States | 48.06 | Q |
| 3 | Sebastián Martínez | Chile | 48.21 | |
| 4 | Sam Higgie | New Zealand | 48.31 | |
| 5 | David Hamil | Cayman Islands | 49.97 | |
| 6 | Lucien Kramar | Guinea | 52.94 | |

#### Heat 6

| Rank | Name | Nationality | Time | Notes |
| 1 | Shinji Ishikawa | Japan | 46.53 | Q |
| 2 | Richard Sharp | South Africa | 46.84 | Q |
| 3 | Sherridan Kirk | Trinidad and Tobago | 47.06 | q |
| 4 | Abdellatif El-Ghazaoui | Morocco | 48.35 | |
| 5 | Hamed Al-Bishi | Saudi Arabia | 48.40 | |
| 6 | Elton Spain | United States | 50.03 | |
| 7 | Ku King Kit | Hong Kong | 51.92 | |

## Participation

According to an unofficial count, 42 athletes from 34 countries participated in the event.
* Anguilla (1)
* Australia (2)
* Bahamas (1)
* Cayman Islands (1)
* Chile (1)
* Chinese Taipei (1)
* El Salvador (1)
* France (1)
* Germany (2)
* Guam (1)
* Guinea (1)
* Hong Kong (1)
* Hungary (1)
* Ireland (1)
* Jamaica (1)
* Japan (2)
* Kenya (1)
* Madagascar (1)
* Morocco (1)
* New Zealand (1)
* Northern Mariana Islands (1)
* Poland (1)
* Puerto Rico (1)
* Romania (1)
* Russia (1)
* Saint Kitts and Nevis (1)
* Saint Lucia (1)
* Saudi Arabia (2)
* South Africa (2)
* Spain (1)
* Trinidad and Tobago (2)
* Ukraine (1)
* United States (2)
* Venezuela (2)