| RK | LN | Name | Time | Gap | FINA | Q? |
|---|---|---|---|---|---|---|
| 1 | 5 | Dobos Botond (2013)Miskolci Sportiskola | 47.13R:0.73 | - | 124 | |
| 2 | 7 | Kardos Tibor Kristóf (2015)FTC | 47.15R:0.7 | 00.02 | 124 | |
| 3 | 2 | Büki Norbert János (2016)FTC | 48.09R:0.81 | 00.96 | 117 | |
| 4 | 4 | Sipkó Márk (2013)Gigászok SE | 48.97R:0.66 | 01.84 | 111 | |
| 5 | 1 | Gregorics Miklós (2014)BVSC-Zugló | 49.27R:0.66 | 02.14 | 109 | |
| 6 | 8 | Dalmadi Ádám (2015)BVSC-Zugló | 50.62R:0.77 | 03.49 | 100 | |
| 7 | 6 | Hörich Misa Sámuel (2016)Bohóchal | 50.68R:0.6 | 03.55 | 100 | |
| 8 | 3 | Tordai Dániel (2017)Kőbánya Sport Club | 51.89R:0.54 | 04.76 | 93 |