# Swimming at the 2005 World Aquatics Championships – Men's 400 metre freestyle

The men's 400 metre freestyle at the 2005 World Aquatics Championships took place on 24 July (heats and final) in the Olympic pool at Parc Jean-Drapeau in Montreal, Canada. 57 swimmers were entered and in the event in the preliminary heats, the top-8 of which advanced on to swim again in the final heat that event.
The existing records at the start of the event were:
* World record (WR): 3:40.08, Ian Thorpe (Australia), 30 July 2002 in Manchester, UK.
* Championship record (CR): 3:40.17, Ian Thorpe (Australia), Fukuoka 2001 (22 July 2001)

## Results
### Final

| Place | Name | Nationality | Time |
| 1 | Grant Hackett | Australia | 3:42.91 |
| 2 | Yuri Prilukov | Russia | 3:44.44 |
| 3 | Oussama Mellouli | Tunisia | 3:46.08 |
| 4 | Massimiliano Rosolino | Italy | 3:46.91 |
| 5 | Dragoș Coman | Romania | 3:47.16 |
| 6 | Peter Vanderkaay | USA | 3:47.83 |
| 7 | Takeshi Matsuda | Japan | 3:48.60 |
| 8 | Nicolas Rostoucher | France | 3:50.51 |

### Prelims

| Rank | Name | Nationality | Time | Note |
| 1 | Grant Hackett | Australia | 3:44.63 | Q |
| 2 | Dragoș Coman | Romania | 3:46.70 | Q, NR |
| 3 | Takeshi Matsuda | Japan | 3:47.28 | Q |
| 4 | Yuri Prilukov | Russia | 3:47.48 | Q |
| 5 | Peter Vanderkaay | USA | 3:47.59 | Q |
| 6 | Oussama Mellouli | Tunisia | 3:48.89 | Q |
| 7 | Massimiliano Rosolino | Italy | 3:48.93 | Q |
| 8 | Nicolas Rostoucher | France | 3:49.00 | Q |
| 9 | Emiliano Brembilla | Italy | 3:49.34 | |
| 10 | Nicholas Sprenger | Australia | 3:49.55 | |
| 11 | Przemysław Stańczyk | Poland | 3:49.72 | |
| 12 | Dimitrios Manganas | Greece | 3:49.99 | |
| 13 | Sergiy Fesenko | Ukraine | 3:50.15 | |
| 14 | Sho Uchida | Japan | 3:50.17 | |
| 15 | Christian Hein | Germany | 3:50.24 | |
| 16 | Sébastien Rouault | France | 3:50.33 | |
| 17 | Andrew Herd | Canada | 3:50.47 | |
| 18 | Michael Phelps | USA | 3:50.53 | |
| 19 | ZHANG Lin | China | 3:51.88 | |
| 20 | Paul Biedermann | Germany | 3:52.45 | |
| 21 | David Carry | Great Britain | 3:52.88 | |
| 22 | Colin Russell | Canada | 3:52.92 | |
| 23 | Spyridon Gianniotis | Greece | 3:53.19 | |
| 24 | Felipe Araujo | Brazil | 3:54.57 | |
| 25 | Igor Snitko | Ukraine | 3:55.35 | |
| 26 | Paweł Korzeniowski | Poland | 3:55.43 | |
| 27 | Květoslav Svoboda | Czech Republic | 3:55.62 | |
| 28 | Luka Turk | Slovenia | 3:56.26 | |
| 29 | Dominik Koll | Austria | 3:56.58 | |
| 30 | Gard Kvale | Norway | 3:57.66 | |
| 31 | Stef Verachten | Belgium | 3:58.20 | |
| 32 | Xin Tong | China | 3:58.31 | |
| 33 | Moss Burmester | New Zealand | 3:58.35 | |
| 34 | Giancarlo Zolezzi | Chile | 3:58.74 | |
| 35 | Shai Livnat | Israel | 3:59.48 | |
| 36 | Mahrez Mebarek | Algeria | 3:59.84 | |
| 37 | HAN Kuk-In | South Korea | 4:01.01 | |
| 38 | Miguel Mendoza | Philippines | 4:02.82 | |
| 39 | Evan Marcus | Guatemala | 4:03.50 | |
| 40 | Muhammad Akbar Nasution | Indonesia | 4:03.92 | |
| 41 | Sebastian Arango Herrera | Colombia | 4:04.47 | |
| 42 | PARK Tae-Hawn | South Korea | 4:04.76 | |
| 43 | Sheng-Chieh Tang | Chinese Taipei | 4:06.72 | |
| 44 | Salvador Mallat | Chile | 4:06.90 | |
| 45 | Lionel Lee | Singapore | 4:07.04 | |
| 46 | Nawaf Al-Wazzan | Kuwait | 4:07.64 | |
| 47 | Timur Irgashev | Uzbekistan | 4:08.58 | |
| 48 | Ibrahim Nazarov | Uzbekistan | 4:10.75 | |
| 49 | Irakli Revishvili | Georgia | 4:12.18 | |
| 50 | Kuo-Chuan Tsai | Chinese Taipei | 4:12.58 | |
| 51 | Marcus Cheah | Singapore | 4:13.93 | |
| 52 | Neil Agius | Malta | 4:16.44 | |
| 53 | Omar Núñez | Nicaragua | 4:20.27 | |
| 54 | Steven Mangroo | Seychelles | 4:20.47 | |
| 55 | Antonio Tong | Macao | 4:21.43 | |
| 56 | Loai Tashkandi | Saudi Arabia | 4:26.07 | |
| 57 | Aung Kyaw Moe | Myanmar | 4:46.71 | |