| RK | LN | Name | Time | Gap | FINA | Q? |
|---|---|---|---|---|---|---|
| 1 | 6 | Losonczi Vencel (2016)Kecskeméti Sportiskola | 49.21R:0.69 | - | 109 | |
| 2 | 5 | Kószó Benett (2016)Kőbánya Sport Club | 50.32R:0.68 | 01.11 | 102 | |
| 3 | 3 | Balogh Boldizsár (2016)Kőbánya Sport Club | 54.84R:0.81 | 05.63 | 79 | |
| 4 | 4 | Hlavács Dominik (2016)BVSC-Zugló | 55.06R:0.8 | 05.85 | 78 |