Swimming at the 2011 World Aquatics Championships – Men's 400 metre freestyle
The men's 400 metre freestyle competition of the swimming events at the 2011 World Aquatics Championships took place July 24. The heats and final took place on July 24.
Records
Prior to the competition, the existing world and championship records were as follows.| Name | Nation | Time | Location | Date | |
| World record Championship record | Paul Biedermann | 3:40.07 | Rome | July 26, 2009 |
Results
Heats
49 swimmers participated in 7 heats, qualified swimmers are listed:| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 7 | 4 | Sun Yang | 3:44.87 | Q | |
| 2 | 5 | 3 | Peter Vanderkaay | 3:45.02 | Q | |
| 3 | 5 | 5 | Paul Biedermann | 3:45.18 | Q | |
| 4 | 6 | 5 | Oussama Mellouli | 3:45.90 | Q | |
| 5 | 6 | 6 | Sébastien Rouault | 3:46.20 | Q | |
| 6 | 5 | 4 | Yannick Agnel | 3:46.72 | Q | |
| 7 | 6 | 4 | Park Tae-Hwan | 3:46.74 | Q | |
| 8 | 6 | 3 | Ryan Cochrane | 3:46.88 | Q | |
| 9 | 7 | 6 | Samuel Pizzetti | 3:47.12 | ||
| 10 | 6 | 2 | Gergő Kis | 3:47.26 | ||
| 11 | 6 | 1 | Dai Jun | 3:47.58 | ||
| 12 | 7 | 1 | Mads Glæsner | 3:48.41 | ||
| 13 | 7 | 5 | Ryan Napoleon | 3:48.54 | ||
| 14 | 5 | 6 | Charlie Houchin | 3:48.80 | ||
| 15 | 5 | 1 | David Carry | 3:48.89 | ||
| 16 | 5 | 8 | Heerden Herman | 3:49.55 | ||
| 17 | 7 | 8 | Sho Uchida | 3:49.70 | ||
| 18 | 7 | 7 | Robert Renwick | 3:49.91 | ||
| 19 | 7 | 3 | Thomas Fraser-Holmes | 3:50.71 | ||
| 20 | 4 | 2 | Juan Martin Pereyra | 3:51.03 | NR | |
| 21 | 7 | 2 | Clemens Rapp | 3:51.07 | ||
| 22 | 5 | 7 | Dominik Meichtry | 3:51.32 | ||
| 23 | 4 | 1 | Cristian Quintero | 3:52.73 | ||
| 24 | 5 | 2 | Nikita Lobintsev | 3:53.52 | ||
| 25 | 4 | 5 | David Brandl | 3:54.73 | ||
| 26 | 4 | 3 | Velimir Stjepanović | 3:54.87 | ||
| 27 | 6 | 8 | Sergiy Frolov | 3:55.01 | ||
| 28 | 3 | 3 | Mohamed Farhoud | 3:55.32 | ||
| 29 | 4 | 7 | Mateo de Angulo | 3:55.92 | ||
| 30 | 4 | 4 | Dylan Dunlop-Barrett | 3:56.04 | ||
| 31 | 4 | 6 | Mateusz Sawrymowicz | 3:56.22 | ||
| 32 | 4 | 8 | Raul Martinez | 3:58.35 | ||
| 33 | 3 | 2 | Sobitjon Amilov | 3:59.01 | ||
| 34 | 3 | 6 | Mario Montoya | 4:00.88 | ||
| 35 | 3 | 5 | Sebastian Jahnsen | 4:00.93 | ||
| 36 | 3 | 4 | Irakli Revishvili | 4:02.97 | ||
| 37 | 3 | 7 | Pavol Jelenak | 4:03.82 | ||
| 38 | 3 | 8 | Emanuele Nicolini | 4:04.38 | ||
| 39 | 2 | 4 | Allan Gutierrez | 4:06.56 | ||
| 40 | 3 | 1 | Nicholas Schwab | 4:08.40 | ||
| 40 | 6 | 7 | Ahmed Mathlouthi | 4:08.40 | ||
| 42 | 2 | 3 | Mattew Abeysinghe | 4:09.45 | ||
| 43 | 2 | 5 | Iacovos Hadjiconstantinou | 4:13.53 | ||
| 44 | 2 | 6 | Gebrel Ahmed | 4:18.40 | ||
| 45 | 2 | 7 | Douglas Miller | 4:20.74 | ||
| 46 | 2 | 2 | Heimanu Sichan | 4:21.24 | ||
| 47 | 1 | 4 | Anderson Lim | 4:34.95 | ||
| 48 | 1 | 5 | Ryan Govinden | 4:55.10 | ||
| 49 | 1 | 3 | Chamraen Youri Maximov | 4:55.35 |
Final
The final was held at 18:13.| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | Park Tae-Hwan | 3:42.04 | |||
| 4 | Sun Yang | 3:43.24 | |||
| 3 | Paul Biedermann | 3:44.14 | |||
| 4 | 5 | Peter Vanderkaay | 3:44.83 | ||
| 5 | 8 | Ryan Cochrane | 3:45.17 | ||
| 6 | 7 | Yannick Agnel | 3:45.24 | ||
| 7 | 6 | Oussama Mellouli | 3:45.31 | ||
| 8 | 2 | Sébastien Rouault | 3:47.66 |