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

| Rank_ | Heat | Lane | Name_ | Nationality | Time_ |
|---|---|---|---|---|---|
| 1 | 4 | 4 | Michael Phelps | United States | 4:07.82 |
| 2 | 2 | 4 | László Cseh | Hungary | 4:09.26 |
| 3 | 4 | 5 | Luca Marin | Italy | 4:10.22 |
| 4 | 3 | 4 | Ryan Lochte | United States | 4:10.33 |
| 5 | 4 | 3 | Gergő Kis | Hungary | 4:10.66 |
| 6 | 2 | 3 | Alessio Boggiatto | Italy | 4:10.68 |
| 7 | 3 | 7 | Brian Johns | Canada | 4:11.41 |
| 8 | 3 | 5 | Thiago Pereira | Brazil | 4:11.74 |
| 9 | 4 | 2 | Keith Beavers | Canada | 4:12.75 |
| 10 | 2 | 1 | Bradley Ally | Barbados | 4:14.01 |
| 11 | 2 | 8 | Gal Nevo | Israel | 4:14.03 |
| 12 | 3 | 3 | Riaan Schoeman | South Africa | 4:14.09 |
| 13 | 3 | 1 | Andrey Krylov | Russia | 4:14.55 |