Rowing at the 2008 Summer Olympics – Men's single sculls Semifinal A/B 1 Semifinal A/B 1

| Rank_ | Athlete | Country | Time_ | Notes |
|---|---|---|---|---|
| 1 | Lassi Karonen | Sweden | 6:57.28 | FA |
| 2 | Olaf Tufte | Norway | 6:58.23 | FA |
| 3 | Tim Maeyens | Belgium | 6:59.65 | FA |
| 4 | Marcel Hacker | Germany | 7:03.05 | FB |
| 5 | Andre Vonarburg | Switzerland | 7:14.64 | FB |
| 6 | Peter Hardcastle | Australia | 7:32.79 | FB |