The men's 400 metres event at the 2004 World Junior Championships in Athletics was held in Grosseto, Italy, at Stadio Olimpico Carlo Zecchini on 13, 14 and 15 July. [1] [2]
| Gold | LaShawn Merritt |
| Silver | Nagmeldin Ali Abubaker |
| Bronze | Obakeng Ngwigwa |
15 July
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| LaShawn Merritt | 45.25 | |||
| Nagmeldin Ali Abubaker | 45.97 | |||
| Obakeng Ngwigwa | 45.97 | |||
| 4 | Valentin Kruglyakov | 46.40 | ||
| 5 | Serdar Tamac | 46.63 | ||
| 6 | Sean Wroe | 46.84 | ||
| 7 | Keith Hinnant | 46.88 | ||
| 8 | Paulo Orlando | 46.95 |
14 July
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | LaShawn Merritt | 45.84 | Q | |
| 2 | Nagmeldin Ali Abubaker | 45.99 | Q | |
| 3 | Andrés Rodríguez | 47.42 | ||
| 4 | Michael Gardener | 47.49 | ||
| 5 | Manoi Pushpa Kumara | 47.65 | ||
| 6 | Andretti Bain | 47.86 | ||
| 7 | Ruaan Grobler | 49.26 | ||
| Renny Quow | DQ | IAAF rule 163.3 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Obakeng Ngwigwa | 46.64 | Q | |
| 2 | Sean Wroe | 46.80 | Q | |
| 3 | Keith Hinnant | 46.93 | q | |
| 4 | Richard Buck | 47.18 | ||
| 5 | Kazunori Ota | 47.40 | ||
| 6 | Damian Kempa | 47.62 | ||
| 7 | Claudio Licciardello | 48.19 | ||
| 8 | Yudai Sasaki | 48.27 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Valentin Kruglyakov | 46.46 | Q | |
| 2 | Serdar Tamac | 46.94 | Q | |
| 3 | Paulo Orlando | 47.02 | q | |
| 4 | Željko Vincek | 47.08 | ||
| 5 | Cory Innes | 47.37 | ||
| 6 | Maksim Aleksandrenko | 47.79 | ||
| 7 | Ben Offereins | 48.25 | ||
| Roger Polydore | DNF |
13 July
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Keith Hinnant | 46.54 | Q | |
| 2 | Andrés Rodríguez | 47.02 | Q | |
| 3 | Renny Quow | 47.19 | Q | |
| 4 | Andretti Bain | 47.25 | q | |
| 5 | Chris Gebhardt | 47.58 | ||
| 6 | Morgan Carlington | 48.41 | ||
| 7 | Khalid Salem | 49.22 | ||
| 8 | Chang Chia-Wei | 50.43 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Nagmeldin Ali Abubaker | 46.68 | Q | |
| 2 | Cory Innes | 47.31 | Q | |
| 3 | Ben Offereins | 47.54 | Q | |
| 4 | Carlos Pérez | 47.68 | ||
| 5 | Teddy Venel | 47.73 | ||
| 6 | Gopal Khatri Chhetri | 54.53 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Maksim Aleksandrenko | 47.47 | Q | |
| 2 | Kazunori Ota | 47.88 | Q | |
| 3 | Ruaan Grobler | 48.09 | Q | |
| 4 | Udomsinachi Erete | 48.70 | ||
| 5 | Wilson Lukungu Waiswa | 48.73 | ||
| 6 | Daryl Vassallo | 49.38 | ||
| 7 | Takeshi Fujiwara | 49.66 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | LaShawn Merritt | 46.70 | Q | |
| 2 | Sean Wroe | 47.17 | Q | |
| 3 | Damian Kempa | 47.43 | Q | |
| 4 | Roger Polydore | 47.43 | q | |
| 5 | Cristián Reyes | 48.14 | ||
| 6 | Vasile Bobos | 48.67 | ||
| 7 | Nicholas Mangham | 58.29 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Serdar Tamac | 47.14 | Q | |
| 2 | Manoi Pushpa Kumara | 47.16 | Q | |
| 3 | Paulo Orlando | 47.48 | Q | |
| 4 | Lukasz Pryga | 47.93 | ||
| 5 | Antti Toivonen | 48.09 | ||
| Félix Martínez | DQ | IAAF rule 163.3 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Valentin Kruglyakov | 46.48 | Q | |
| 2 | Richard Buck | 47.00 | Q | |
| 3 | Michael Gardener | 47.06 | Q | |
| 4 | Claudio Licciardello | 47.35 | q | |
| 5 | Roman Holly | 47.74 | ||
| 6 | Frank Puriza | 48.07 | ||
| 7 | José Eduardo Acevedo | 48.95 |
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| 1 | Obakeng Ngwigwa | 46.92 | Q | |
| 2 | Željko Vincek | 47.68 | Q | |
| 3 | Yudai Sasaki | 47.83 | Q | |
| 4 | Mikhail Ratnikov | 48.06 | ||
| 5 | Mohamed Moussa | 48.66 | ||
| 6 | Sou Chon Kin | 51.72 |
According to an unofficial count, 47 athletes from 39 countries participated in the event.