The men's 3000 metres steeplechase event at the 2004 World Junior Championships in Athletics was held in Grosseto, Italy, at Stadio Olimpico Carlo Zecchini on 14 and 17 July.
| Gold | Ronald Rutto | |
| Silver | Musa Amer Obaid | |
| Bronze | Moustafa Ahmed Shebto |
17 July
| Rank | Name | Nationality | Time | Notes | |||
|---|---|---|---|---|---|---|---|
| align=left | align=left | | 8:23.32 | ||||
| align=left | align=left | | 8:23.38 | ||||
| align=left | align=left | | 8:26.04 | ||||
| 4 | align=left | align=left | | 8:30.77 | |||
| 5 | align=left | align=left |  | 8:37.23 | |||
| 6 | align=left | align=left |  | 8:40.10 | |||
| 7 | align=left | align=left |  | 8:51.47 | |||
| 8 | align=left | align=left |  | 8:52.49 | |||
| 9 | align=left | align=left |  | 8:53.10 | |||
| 10 | align=left | align=left | | 8:54.27 | |||
| 11 | align=left | align=left |  | 8:56.88 | |||
| 12 | align=left | align=left | 9:06.45 |
14 July
| Rank | Name | Nationality | Time | Notes | |||
|---|---|---|---|---|---|---|---|
| 1 | align=left | align=left | | 8:47.70 | Q | ||
| 2 | align=left | align=left | | 8:47.98 | Q | ||
| 3 | align=left | align=left | | 8:52.36 | Q | ||
| 4 | align=left | align=left | 8:52.79 | q | |||
| 5 | align=left | align=left |  | 8:57.90 | |||
| 6 | align=left | align=left | 8:59.58 | ||||
| 7 | align=left | align=left | 9:07.44 | ||||
| 8 | align=left | align=left | 9:09.43 | ||||
| 9 | align=left | align=left |  | 9:22.34 | |||
| align=left | align=left | DNF | |||||
| align=left | align=left | | DNF |
| Rank | Name | Nationality | Time | Notes | |||
|---|---|---|---|---|---|---|---|
| 1 | align=left | align=left | | 8:52.90 | Q | ||
| 2 | align=left | align=left | | 8:53.10 | Q | ||
| 3 | align=left | align=left | | 8:53.22 | Q | ||
| 4 | align=left | align=left | 8:53.76 | ||||
| 5 | align=left | align=left | | 8:55.02 | |||
| 6 | align=left | align=left |  | 9:00.58 | |||
| 7 | align=left | align=left | 9:04.16 | ||||
| 8 | align=left | align=left |  | 9:04.50 | |||
| 9 | align=left | align=left |  | 9:06.06 | |||
| 10 | align=left | align=left | | 9:09.53 | |||
| 11 | align=left | align=left |  | 9:33.01 |
| Rank | Name | Nationality | Time | Notes | |||
|---|---|---|---|---|---|---|---|
| 1 | align=left | align=left | | 8:35.51 | Q | ||
| 2 | align=left | align=left | | 8:39.12 | Q | ||
| 3 | align=left | align=left | | 8:49.08 | Q | ||
| 4 | align=left | align=left | | 8:50.19 | q | ||
| 5 | align=left | align=left | | 8:53.69 | q | ||
| 6 | align=left | align=left | | 8:55.19 | |||
| 7 | align=left | align=left | | 9:00.59 | |||
| 8 | align=left | align=left | 9:01.20 | ||||
| 9 | align=left | align=left | 9:06.72 | ||||
| 10 | align=left | align=left | 9:07.81 | ||||
| 11 | align=left | align=left |  | 9:08.64 |
According to an unofficial count, 33 athletes from 22 countries participated in the event.