| Lane | Swimmer | Team | Place | Time |
|---|---|---|---|---|
| 1 | 17 | 53.83 | ||
| 1 | 2 | 40.19 | ||
| 1 | 20 | DQ | ||
| 2 | 9 | 49.28 | ||
| 2 | 20 | DQ | ||
| 2 | 10 | 49.32 | ||
| 3 | 16 | 53.00 | ||
| 3 | 8 | 48.69 | ||
| 3 | 15 | 52.58 | ||
| 4 | 6 | 47.53 | ||
| 4 | 7 | 48.40 | ||
| 4 | 4 | 44.36 | ||
| 5 | 3 | 44.25 | ||
| 5 | 11 | 49.50 | ||
| 5 | 1 | 39.55 | ||
| 6 | 5 | 46.38 | ||
| 6 | 19 | 57.94 | ||
| 6 | 13 | 52.03 | ||
| 7 | 20 | NS | ||
| 7 | 20 | DQ | ||
| 7 | 12 | 50.18 | ||
| 8 | 18 | 54.81 | ||
| 8 | 14 | 52.52 |