Swimming at the 2008 Summer Olympics – Men's 400 metre freestyle Heats Heats

| Heat | Lane | Name_ | Nationality | Time_ |
|---|---|---|---|---|
| 5 | 8 | Dragoș Coman | Romania | 3:47.79 |
| 3 | 7 | Paul Biedermann | Germany | 3:48.03 |
| 5 | 6 | Przemysław Stańczyk | Poland | 3:48.11 |
| 2 | 5 | David Brandl | Austria | 3:48.63 |
| 3 | 8 | Dean Milwain | Great Britain | 3:48.77 |
| 4 | 7 | Paweł Korzeniowski | Poland | 3:48.78 |
| 2 | 4 | Sébastien Rouault | France | 3:48.84 |
| 2 | 3 | Spyridon Gianniotis | Greece | 3:49.34 |
| 3 | 6 | Craig Stevens | Australia | 3:50.22 |
| 1 | 5 | Gard Kvale | Norway | 3:50.47 |
| 2 | 7 | Dominik Meichtry | Switzerland | 3:50.55 |
| 4 | 2 | Sun Yang | China | 3:50.90 |
| 4 | 1 | Christian Kubusch | Germany | 3:52.73 |
| 2 | 6 | Jean Basson | South Africa | 3:52.90 |
| 1 | 4 | Daniele Tirabassi | Venezuela | 3:53.26 |
| 2 | 8 | Balázs Gercsák | Hungary | 3:54.14 |
| 1 | 3 | Květoslav Svoboda | Czech Republic | 3:56.54 |