Swimming at the 2008 Summer Olympics – Men's 100 metre freestyle Heats Heats

| Rank_ | Heat | Lane | Name_ | Nationality | Time_ |
|---|---|---|---|---|---|
| 1 | 8 | 4 | Eamon Sullivan | Australia | 47.80 |
| 2 | 8 | 5 | Stefan Nystrand | Sweden | 47.83 |
| 3 | 7 | 6 | Brent Hayden | Canada | 47.84 |
| 4 | 9 | 4 | Alain Bernard | France | 47.85 |
| 5 | 8 | 6 | Pieter van den Hoogenband | Netherlands | 47.97 |
| 6 | 7 | 8 | Milorad Čavić | Serbia | 48.15 |
| 7 | 8 | 3 | César Cielo Filho | Brazil | 48.16 |
| 8 | 9 | 5 | Garrett Weber-Gale | United States | 48.19 |
| 9 | 9 | 7 | Lyndon Ferns | South Africa | 48.26 |
| 10 | 7 | 3 | Filippo Magnini | Italy | 48.30 |
| 11 | 7 | 4 | Jason Lezak | United States | 48.33 |
| 12 | 9 | 6 | Matt Targett | Australia | 48.40 |
| 13 | 7 | 5 | Fabien Gilot | France | 48.42 |