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

| Rank_ | Heat | Lane | Name_ | Nationality | Time_ |
|---|---|---|---|---|---|
| 1 | 4 | 4 | Matt Grevers | United States | 53.41 |
| 2 | 4 | 5 | Arkady Vyatchanin | Russia | 53.64 |
| 3 | 6 | 4 | Aaron Peirsol | United States | 53.65 |
| 4 | 6 | 7 | Aschwin Wildeboer Faber | Spain | 53.67 |
| 5 | 3 | 5 | Gerhardus Zandberg | South Africa | 53.75 |
| 6 | 6 | 5 | Liam Tancock | Great Britain | 53.85 |
| 7 | 5 | 3 | Hayden Stoeckel | Australia | 53.93 |
| 8 | 3 | 8 | Ľuboš Križko | Slovakia | 54.07 |
| 9 | 5 | 5 | Ashley Delaney | Australia | 54.08 |
| 10 | 5 | 2 | Junichi Miyashita | Japan | 54.12 |
| 11 | 4 | 2 | Stanislav Donets | Russia | 54.18 |
| 12 | 4 | 3 | Tomomi Morita | Japan | 54.21 |
| 13 | 6 | 3 | Markus Rogan | Austria | 54.22 |