Swimming at the 2008 Summer Olympics – Men's 100 metre backstroke Semifinal 2 Semifinal 2

| Rank_ | Lane | Name_ | Nationality | Time_ |
|---|---|---|---|---|
| 1 | 6 | Hayden Stoeckel | Australia | 52.97 |
| 2 | 4 | Matt Grevers | United States | 52.99 |
| 3 | 5 | Aaron Peirsol | United States | 53.56 |
| 4 | 2 | Ashley Delaney | Australia | 53.76 |
| 5 | 1 | Markus Rogan | Austria | 53.80 |
| 6 | 3 | Gerhardus Zandberg | South Africa | 53.98 |
| 7 | 7 | Stanislav Donets | Russia | 54.57 |
| 8 | 8 | Guy Barnea | Israel | 54.93 |