# Swimming at the 2013 World Aquatics Championships – Men's 400 metre freestyle

The men's 400 metre freestyle event in swimming at the 2013 World Aquatics Championships took place on 28 July at the Palau Sant Jordi in Barcelona, Spain.

## Records

Prior to this competition, the existing world and championship records were:
| World record | Paul Biedermann (GER) | 3:40.07 | Rome, Italy | 26 July 2009 |
| Competition record | Paul Biedermann (GER) | 3:40.07 | Rome, Italy | 26 July 2009 |

## Results
### Heats

The heats were held at 10:16.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 4 | Sun Yang | China | 3:44.67 | Q |
| 2 | 5 | 6 | Ryan Cochrane | Canada | 3:45.74 | Q |
| 3 | 5 | 5 | Jordan Harrison | Australia | 3:46.85 | Q |
| 4 | 3 | 4 | Kosuke Hagino | Japan | 3:46.92 | Q |
| 5 | 5 | 7 | Devon Brown | South Africa | 3:47.17 | Q |
| 6 | 3 | 5 | Hao Yun | China | 3:47.49 | Q |
| 7 | 4 | 5 | Connor Jaeger | United States | 3:47.83 | Q |
| 8 | 3 | 6 | James Guy | Great Britain | 3:47.86 | Q |
| 9 | 3 | 3 | Robbie Renwick | Great Britain | 3:47.99 | |
| 10 | 4 | 6 | Matthew Stanley | New Zealand | 3:48.25 | |
| 11 | 4 | 7 | Ahmed Mathlouthi | Tunisia | 3:49.45 | |
| 12 | 4 | 4 | David McKeon | Australia | 3:49.51 | |
| 13 | 5 | 3 | Matt McLean | United States | 3:49.74 | |
| 14 | 4 | 2 | Gabriele Detti | Italy | 3:49.78 | |
| 15 | 4 | 1 | Filip Zaborowski | Poland | 3:50.22 | |
| 16 | 4 | 3 | Gergő Kis | Hungary | 3:50.87 | |
| 17 | 3 | 1 | Matias Koski | Finland | 3:51.04 | |
| 18 | 5 | 2 | Velimir Stjepanović | Serbia | 3:51.90 | |
| 19 | 5 | 0 | David Brandl | Austria | 3:51.98 | |
| 20 | 3 | 7 | Cristian Quintero | Venezuela | 3:52.03 | |
| 21 | 2 | 3 | Richárd Nagy | Slovakia | 3:53.10 | |
| 22 | 3 | 2 | Samuel Pizzetti | Italy | 3:53.26 | |
| 23 | 5 | 8 | Ward Bauwens | Belgium | 3:53.60 | |
| 24 | 2 | 5 | Marwan Ismail | Egypt | 3:53.80 | NR |
| 25 | 5 | 1 | Serhiy Frolov | Ukraine | 3:53.92 | |
| 26 | 1 | 8 | Martin Grodzki | Germany | 3:54.47 | |
| 27 | 2 | 6 | Anton Sveinn McKee | Iceland | 3:54.67 | NR |
| 28 | 2 | 1 | Welliam Maksi | Syria | 3:56.29 | |
| 28 | 2 | 2 | Povilas Strazdas | Lithuania | 3:56.29 | |
| 30 | 4 | 9 | Jeong Jeong-Soo | South Korea | 3:56.68 | |
| 31 | 5 | 9 | Arturo Pérez Vertti | Mexico | 3:57.28 | |
| 32 | 3 | 8 | Damien Joly | France | 3:57.32 | |
| 33 | 2 | 4 | Nezir Karap | Turkey | 3:57.37 | |
| 34 | 4 | 8 | Dominik Meichtry | Switzerland | 3:57.65 | |
| 35 | 3 | 0 | Ihar Boki | Belarus | 3:58.27 | |
| 36 | 4 | 0 | Martin Naidich | Argentina | 3:58.92 | |
| 37 | 3 | 9 | Kevin Yeap | Malaysia | 3:59.08 | |
| 38 | 1 | 4 | Nicholas Schwab | Dominican Republic | 3:59.29 | NR |
| 39 | 2 | 7 | Marcelo Acosta Jiménez | El Salvador | 4:02.21 | |
| 40 | 2 | 0 | Yeziel Morales | Puerto Rico | 4:02.28 | |
| 41 | 2 | 9 | Matthew Lowe | Bahamas | 4:03.01 | |
| 42 | 1 | 5 | Ahmed Gebrel | Palestine | 4:07.70 | |
| 43 | 2 | 8 | Phạm Thành Nguyện | Vietnam | 4:13.91 | |
| 44 | 1 | 3 | Guillermo Lopéz | Nicaragua | 4:20.85 | |
| 45 | 1 | 7 | Sovijja Pou | Cambodia | 4:22.67 | |
| 46 | 1 | 6 | Klavio Meca | Albania | 4:27.25 | |
| 47 | 1 | 1 | Brandon Schuster | Samoa | 4:29.60 | |
| 48 | 1 | 2 | Khalid Baba | Bahrain | 4:29.94 | |

### Final

The final was held at 18:13.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Sun Yang | China | 3:41.59 |
| | 6 | Kosuke Hagino | Japan | 3:44.82 |
| | 1 | Connor Jaeger | United States | 3:44.85 |
| 4 | 5 | Ryan Cochrane | Canada | 3:45.02 |
| 5 | 8 | James Guy | Great Britain | 3:47.96 |
| 6 | 2 | Devon Brown | South Africa | 3:48.40 |
| 6 | 3 | Jordan Harrison | Australia | 3:48.40 |
| 8 | 7 | Hao Yun | China | 3:48.88 |