| RK | LN | Name | Time | Gap | FINA | Q? |
|---|---|---|---|---|---|---|
| 1 | 3 | Trần Hưng Nguyên (2003)Vietnam | 52.25 | - | 723 | |
50m25.69 100m52.2526.56 +0.87
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| 2 | 5 | Ngo Dinh Chuyen (2001)BVSC-Zugló | 52.73 | 00.48 | 704 | |
50m25.65 100m52.7327.08 +1.43
| ||||||
| 3 | 4 | Török Dominik Márk (2002)BVSC-Zugló | 53.08 | 00.83 | 690 | |
50m26.00 100m53.0827.08 +1.08
| ||||||
| 4 | 6 | Csicsáky Péter (2003)BVSC-Zugló | 53.13 | 00.88 | 688 | |
50m26.11 100m53.1327.02 +0.91
| ||||||
| 5 | 7 | Kovács Bálint (2002)BVSC-Zugló | 53.25 | 01.00 | 683 | |
50m26.02 100m53.2527.23 +1.21
| ||||||
| 6 | 2 | Hồ Nguyễn Duy Khoa (2005)Vietnam | 54.16 | 01.91 | 649 | |
50m26.59 100m54.1627.57 +0.98
| ||||||
| 7 | 1 | Nguyễn Huy Hoàng (2001)Vietnam | 54.19 | 01.94 | 648 | |
50m26.60 100m54.1927.59 +0.99
| ||||||
| 8 | 8 | Székely Áron (2004)BVSC-Zugló | 54.51 | 02.26 | 637 | |
50m26.66 100m54.5127.85 +1.19
| ||||||