# 2010 FINA World Swimming Championships (25 m) – Men's 400 metre freestyle

The Men's 400 Freestyle at the 10th FINA World Swimming Championships (25m) was swum 17 December 2010 in Dubai, United Arab Emirates. 51 individuals swam in the preliminary heats in the morning, with the top-8 finishers advancing to the final that evening to swim again.
At the start of the event, the existing World (WR) and Championship records (CR) were:
| | Name | Nation | Time | Location | Date |
| WR | Paul Biedermann | Germany | 3:32.77 | Berlin | 14 November 2009 |
| CR | Grant Hackett | Australia | 3:35.01 | Hong Kong | 1 April 1999 |

## Results
### Heats

| Rank | Heat | Lane | Name | Time | Notes |
| 1 | 7 | 4 | Oussama Mellouli (TUN) | 3:39.64 | Q |
| 2 | 7 | 5 | Peter Vanderkaay (USA) | 3:39.96 | Q |
| 3 | 6 | 4 | Mads Glæsner (DEN) | 3:39.98 | Q |
| 4 | 5 | 5 | Ahmed Mathlouthi (TUN) | 3:40.07 | Q |
| 5 | 7 | 6 | Yannick Agnel (FRA) | 3:40.16 | Q |
| 6 | 7 | 2 | Nikita Lobintsev (RUS) | 3:40.31 | Q |
| 7 | 5 | 6 | Sébastien Rouault (FRA) | 3:40.77 | Q |
| 8 | 6 | 5 | Paul Biedermann (GER) | 3:41.44 | Q |
| 9 | 5 | 4 | Federico Colbertaldo (ITA) | 3:41.68 | |
| 10 | 6 | 2 | Dominik Meichtry (SUI) | 3:41.85 | |
| 11 | 6 | 5 | Patrick Murphy (AUS) | 3:42.53 | |
| 12 | 6 | 3 | Charlie Houchin (USA) | 3:43.12 | |
| 13 | 7 | 3 | Pál Joensen (FRO) | 3:44.42 | |
| 14 | 7 | 7 | Zhang Zhongchao (CHN) | 3:45.17 | |
| 15 | 6 | 1 | Gergely Gyurta (HUN) | 3:45.19 | |
| 16 | 1 | 3 | Dai Jun (CHN) | 3:45.34 | |
| 17 | 5 | 3 | Mikhail Polischuk (RUS) | 3:45.84 | |
| 18 | 4 | 3 | Cristian Quintero (VEN) | 3:46.06 | |
| 19 | 3 | 3 | Hassaan Abdel Khalik (CAN) | 3:46.21 | |
| 20 | 4 | 1 | Daniele Tirabassi (VEN) | 3:46.60 | |
| 21 | 5 | 2 | Samuel Pizzetti (ITA) | 3:46.71 | |
| 22 | 5 | 8 | Heerden Herman (RSA) | 3:46.77 | |
| 23 | 5 | 7 | Lucas Kanieski (BRA) | 3:46.82 | |
| 24 | 7 | 8 | Serhiy Frolov (UKR) | 3:46.85 | |
| 25 | 5 | 1 | Christian Scherübl (AUT) | 3:47.54 | |
| 26 | 7 | 1 | Květoslav Svoboda (CZE) | 3:48.37 | |
| 27 | 3 | 4 | Velimir Stjepanović (SRB) | 3:48.56 | |
| 28 | 4 | 5 | Sebastián Jahnsen Madico (PER) | 3:50.03 | |
| 29 | 6 | 7 | Gard Kvale (NOR) | 3:50.28 | |
| 30 | 3 | 6 | Esteban Enderica (ECU) | 3:50.41 | |
| 31 | 6 | 8 | Mitchell Dixon (AUS) | 3:51.71 | |
| 32 | 4 | 2 | Julio Galofre (COL) | 3:52.92 | |
| 33 | 4 | 8 | Ventsislav Aydarski (BUL) | 3:53.80 | |
| 34 | 4 | 4 | Esteban Paz (ARG) | 3:54.10 | |
| 35 | 4 | 7 | Gabriel Villagoiz (ARG) | 3:55.18 | |
| 36 | 3 | 5 | Mohamed Farhoud (EGY) | 3:55.32 | |
| 37 | 3 | 8 | Irakli Revishvili (GEO) | 3:56.50 | |
| 38 | 3 | 7 | Ivan Enderica Ochoa (ECU) | 3:58.53 | |
| 39 | 3 | 1 | Morad Berrada (MAR) | 3:59.35 | |
| 40 | 3 | 2 | Yousef Al-Askari (KUW) | 3:59.88 | |
| 41 | 2 | 3 | Matthew Abeysinghe (SRI) | 4:00.93 | |
| 42 | 4 | 6 | Oleg Rabota (KAZ) | 4:00.98 | |
| 43 | 2 | 5 | Sauod Altayar (KUW) | 4:02.19 | |
| 44 | 2 | 6 | Neil Agius (MLT) | 4:07.46 | |
| 45 | 2 | 7 | Edward Caruana Dingli (MLT) | 4:08.10 | |
| 46 | 2 | 8 | Derrick Bakhuis (AHO) | 4:12.41 | |
| 47 | 2 | 1 | Anderson Lim (BRU) | 4:25.66 | |
| 48 | 2 | 2 | Israr Hussain (PAK) | 4:27.06 | |
| 49 | 2 | 4 | Gert Kacani (ALB) | 4:34.27 | |
| 50 | 1 | 4 | Enea Murataj (ALB) | 4:46.80 | |
| 51 | 1 | 5 | Chamraen Youri Maximov (CAM) | 4:49.74 | |

### Final

| Rank | Lane | Name | Nationality | Time |
| | 8 | Paul Biedermann | Germany | 3:37.06 |
| | 7 | Nikita Lobintsev | Russia | 3:37.84 |
| | 4 | Oussama Mellouli | Tunisia | 3:38.17 |
| 4 | 5 | Peter Vanderkaay | United States | 3:38.44 |
| 5 | 3 | Mads Glæsner | Denmark | 3:38.56 |
| 6 | 1 | Sébastien Rouault | France | 3:40.07 |
| 6 | 2 | Yannick Agnel | France | 3:40.07 |
| 8 | 6 | Ahmed Mathlouthi | Tunisia | 3:40.33 |