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

| Heat | Lane | Name_ | Nationality | Time_ |
|---|---|---|---|---|
| 4 | 4 | Larsen Jensen | United States | 3:43.10 |
| 3 | 5 | Zhang Lin | China | 3:43.32 |
| 3 | 4 | Park Tae-Hwan | South Korea | 3:43.35 |
| 4 | 6 | Nikita Lobintsev | Russia | 3:43.45 |
| 5 | 4 | Grant Hackett | Australia | 3:44.03 |
| 5 | 5 | Peter Vanderkaay | United States | 3:44.22 |
| 4 | 5 | Oussama Mellouli | Tunisia | 3:44.54 |
| 5 | 3 | Yuri Prilukov | Russia | 3:44.82 |
| 5 | 2 | Ryan Cochrane | Canada | 3:44.85 |
| 3 | 2 | Takeshi Matsuda | Japan | 3:44.99 |
| 3 | 3 | Federico Colbertaldo | Italy | 3:45.28 |
| 4 | 8 | Mads Glæsner | Denmark | 3:45.38 |
| 4 | 3 | Massimiliano Rosolino | Italy | 3:45.57 |
| 3 | 1 | Nicolas Rostoucher | France | 3:47.15 |
| 5 | 7 | David Carry | Great Britain | 3:47.17 |
| 5 | 1 | Sergey Fesenko | Ukraine | 3:47.75 |