| Event: | Men's 400m Freestyle |
| Competition: | 2003 FINA World Aquatics Championships |
| Dates: | 20 July 2003 |
| Win Value: | 3 minute 42.58 seconds |
| Gold: | Ian Thorpe |
| Goldnoc: | AUS |
| Silver: | Grant Hackett |
| Silvernoc: | AUS |
| Bronze: | Dragos Coman |
| Bronzenoc: | ROU |
| Prev: | 2001 |
| Next: | 2005 |
See main article: Swimming at the 2003 World Aquatics Championships.
The Men's 400 Freestyle event at the 10th FINA World Aquatics Championships swam on 20 July 2003 in Barcelona, Spain.[1] [2]
Prior to the start of the event, the existing World (WR) and Championship (CR) records were:
| Place | Swimmer | Nation | Time | Notes |
|---|---|---|---|---|
| 1 | 3:42.58 | |||
| 2 | 3:45.11 | |||
| 3 | 3:46.87 | |||
| 4 | 3:47.44 | |||
| 5 | 3:47.70 | |||
| 6 | 3:48.50 | |||
| 7 | 3:50.36 | |||
| 8 | 3:51.83 | |||
| Rank | Heat | Lane | Swimmer | Nation | Time | Notes |
|---|---|---|---|---|---|---|
| 1 | 8 | 4 | 3:47.44 | q | ||
| 2 | 7 | 4 | 3:48.35 | q | ||
| 3 | 8 | 3 | 3:48.49 | q | ||
| 4 | 7 | 5 | 3:49.59 | q | ||
| 5 | 8 | 5 | 3:49.85 | q | ||
| 6 | 7 | 3 | 3:49.92 | q | ||
| 7 | 6 | 3 | 3:50.28 | q | ||
| 8 | 6 | 5 | 3:50.29 | q | ||
| 9 | 6 | 7 | 3:52.04 | |||
| 10 | 8 | 8 | 3:52.24 | |||
| 11 | 7 | 7 | 3:52.34 | |||
| 12 | 8 | 2 | 3:52.53 | |||
| 13 | 6 | 1 | 3:52.93 | |||
| 14 | 6 | 2 | 3:53.06 | |||
| 14 | 8 | 6 | 3:53.06 | |||
| 16 | 6 | 4 | 3:53.43 | |||
| 17 | 7 | 6 | 3:54.17 | |||
| 18 | 8 | 1 | 3:54.68 | |||
| 19 | 7 | 2 | 3:54.70 | |||
| 20 | 7 | 8 | 3:54.87 | |||
| 21 | 4 | 8 | 3:55.07 | |||
| 22 | 6 | 6 | 3:55.13 | |||
| 23 | 5 | 1 | 3:55.41 | |||
| 24 | 8 | 7 | 3:55.81 | |||
| 25 | 6 | 8 | 3:56.33 | |||
| 26 | 5 | 3 | 3:57.79 | |||
| 27 | 5 | 8 | 3:57.92 | |||
| 28 | 5 | 6 | 3:58.57 | |||
| 29 | 5 | 5 | 3:58.74 | |||
| 30 | 5 | 2 | 3:59.57 | |||
| 31 | 7 | 1 | 3:59.93 | |||
| 32 | 5 | 4 | 4:00.47 | |||
| 33 | 4 | 5 | 4:01.46 | |||
| 34 | 3 | 4 | 4:02.87 | |||
| 35 | 4 | 4 | 4:02.99 | |||
| 36 | 4 | 3 | 4:03.83 | |||
| 37 | 3 | 6 | 4:04.32 | |||
| 38 | 3 | 5 | 4:04.60 | |||
| 39 | 3 | 1 | 4:05.38 | |||
| 40 | 3 | 7 | 4:05.87 | |||
| 41 | 5 | 7 | 4:06.94 | |||
| 42 | 4 | 1 | 4:08.35 | |||
| 43 | 3 | 2 | 4:08.49 | |||
| 44 | 2 | 4 | 4:09.83 | |||
| 45 | 2 | 3 | 4:11.13 | |||
| 46 | 3 | 3 | 4:11.49 | |||
| 47 | 4 | 7 | 4:11.54 | |||
| 48 | 3 | 8 | 4:11.68 | |||
| 49 | 2 | 6 | 4:12.70 | |||
| 50 | 2 | 2 | 4:14.22 | |||
| 51 | 4 | 6 | 4:14.39 | |||
| 52 | 2 | 1 | 4:23.67 | |||
| 53 | 1 | 6 | 4:25.25 | |||
| 54 | 1 | 5 | 4:25.44 | |||
| 55 | 1 | 4 | 4:26.27 | |||
| 56 | 1 | 3 | 4:30.26 | |||
| 57 | 2 | 5 | 4:30.52 | |||
| 58 | 1 | 2 | 4:31.41 | |||
| 58 | 2 | 7 | 4:31.41 | |||
| 60 | 2 | 8 | 4:31.51 | |||
| – | – | - | DNS | |||
| – | – | - | DNS | |||