| Lane | Swimmer | Team | Place | Time |
|---|---|---|---|---|
| 1 | 13 | 52.74 | ||
| 1 | 20 | DQ | ||
| 1 | 5 | 47.73 | ||
| 2 | 8 | 49.22 | ||
| 2 | 15 | 53.14 | ||
| 2 | 10 | 49.74 | ||
| 3 | 12 | 52.12 | ||
| 3 | 17 | 53.71 | ||
| 3 | 20 | DQ | ||
| 4 | 2 | 43.67 | ||
| 4 | 1 | 42.91 | ||
| 4 | 16 | 53.38 | ||
| 5 | 6 | 48.63 | ||
| 5 | 3 | 43.82 | ||
| 5 | 4 | 47.42 | ||
| 6 | 9 | 49.47 | ||
| 6 | 7 | 48.97 | ||
| 6 | 14 | 52.97 | ||
| 7 | 20 | DQ | ||
| 7 | 11 | 50.59 | ||
| 7 | 19 | 1:15.33 | ||
| 8 | 18 | 54.33 |