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

The men's 400 metres hurdles event at the 2000 World Junior Championships in Athletics was held in Santiago, Chile, at Estadio Nacional Julio Martínez Prádanos on 18, 19 and 21 October.

## Medalists

| Gold | Marek Plawgo Poland |
| Silver | Pieter de Villiers South Africa |
| Bronze | Ockert Cilliers South Africa |

## Results
### Final

21 October
| Rank | Name | Nationality | Time |
| | Marek Plawgo | Poland | 49.23 |
| | Pieter de Villiers | South Africa | 50.52 |
| | Ockert Cilliers | South Africa | 50.58 |
| 4 | Christian Duma | Germany | 50.60 |
| 5 | Yevgeniy Meleshenko | Kazakhstan | 51.05 |
| 6 | Mikael Jakobsson | Sweden | 51.48 |
| 7 | Loïc Clément | France | 52.26 |
| 8 | Sean Avery | Australia | 54.95 |

### Semifinals

19 October

#### Semifinal 1

| Rank | Name | Nationality | Time | Notes |
| 1 | Marek Plawgo | Poland | 50.40 | Q |
| 2 | Ockert Cilliers | South Africa | 51.32 | Q |
| 3 | Loïc Clément | France | 51.76 | Q |
| 4 | Sean Avery | Australia | 51.83 | Q |
| 5 | Masakatsu Tanaka | Japan | 51.94 | |
| 6 | Luis Montenegro | Chile | 52.50 | |
| 7 | Sebastian Linke | Germany | 52.57 | |
| 8 | Ragnar Bergheim | Norway | 52.81 | |

#### Semifinal 2

| Rank | Name | Nationality | Time | Notes |
| 1 | Pieter de Villiers | South Africa | 50.21 | Q |
| 2 | Yevgeniy Meleshenko | Kazakhstan | 50.72 | Q |
| 3 | Christian Duma | Germany | 51.10 | Q |
| 4 | Mikael Jakobsson | Sweden | 51.13 | Q |
| 5 | Federico Rubeca | Italy | 51.31 | |
| 6 | Jorge Chaverra | Colombia | 51.88 | |
| 7 | David Cappellano | Australia | 52.24 | |
| 8 | William da Silva | Brazil | 55.54 | |

### Heats

18 October

#### Heat 1

| Rank | Name | Nationality | Time | Notes |
| 1 | Christian Duma | Germany | 50.86 | Q |
| 2 | Pieter de Villiers | South Africa | 50.90 | Q |
| 3 | Yevgeniy Meleshenko | Kazakhstan | 51.07 | Q |
| 4 | Federico Rubeca | Italy | 51.93 | q |
| 5 | Luis Montenegro | Chile | 52.34 | q |
| 6 | Zulkarnain Purba | Indonesia | 53.32 | |
| 7 | Jonathan Gibson | Panama | 54.73 | |
| | Eliseu de Sena | Brazil | DQ | IAAF rule 168.7 |

#### Heat 2

| Rank | Name | Nationality | Time | Notes |
| 1 | Masakatsu Tanaka | Japan | 51.95 | Q |
| 2 | Ockert Cilliers | South Africa | 51.95 | Q |
| 3 | Sebastian Linke | Germany | 52.13 | Q |
| 4 | William da Silva | Brazil | 52.56 | q |
| 5 | Pablo Martínez | Spain | 52.72 | |
| | Jeffrey Christie | United Kingdom | DQ | IAAF rule 168.7 |
| | Yevgeniy Mikheyko | Belarus | DQ | IAAF rule 168.7 |

#### Heat 3

| Rank | Name | Nationality | Time | Notes |
| 1 | Marek Plawgo | Poland | 51.74 | Q |
| 2 | Sean Avery | Australia | 51.85 | Q |
| 3 | Loïc Clément | France | 52.00 | Q |
| 4 | Ragnar Bergheim | Norway | 52.46 | q |
| 5 | Christopher Hickman | United States | 53.08 | |
| 6 | Daniel Kibet | Kenya | 54.87 | |
| | Álvaro Vallejo | Spain | DQ | IAAF rule 168.7 |

#### Heat 4

| Rank | Name | Nationality | Time | Notes |
| 1 | Mikael Jakobsson | Sweden | 52.00 | Q |
| 2 | Jorge Chaverra | Colombia | 52.36 | Q |
| 3 | David Cappellano | Australia | 52.44 | Q |
| 4 | Hisatoshi Hotta | Japan | 52.89 | |
| 5 | Sergey Mishchenko | Ukraine | 52.97 | |
| 6 | Roberto Córtez | El Salvador | 54.08 | |
| 7 | Greg Little | Jamaica | 54.76 | |

## Participation

According to an unofficial count, 29 athletes from 23 countries participated in the event.
* Australia (2)
* Belarus (1)
* Brazil (2)
* Chile (1)
* Colombia (1)
* El Salvador (1)
* France (1)
* Germany (2)
* Indonesia (1)
* Italy (1)
* Jamaica (1)
* Japan (2)
* Kazakhstan (1)
* Kenya (1)
* Norway (1)
* Panama (1)
* Poland (1)
* South Africa (2)
* Spain (2)
* Sweden (1)
* Ukraine (1)
* United Kingdom (1)
* United States (1)