| RK | LN | Name | Time | Gap | FINA | Q? |
|---|---|---|---|---|---|---|
| 1 | 4 | Zag Benedek (2012)DSI | 49.26 | - | 146 | |
| 2 | 5 | Steiner Ákos (2016)Móri Úszó Egyesület | 49.36R:0.74 | 00.10 | 145 | |
| 3 | 1 | Hegedüs Erik (2012)Pécsi Sportiskola | 50.53R:0.71 | 01.27 | 135 | |
| 4 | 3 | Tóth Ádám Attila (2013)Kaposvári Adorján | 53.65R:0.91 | 04.39 | 113 | |
| 5 | 6 | Tigyi Zsombor (2013)Kaposvári Adorján | 53.93R:0.84 | 04.67 | 111 | |
| 6 | 7 | Brands Patrik (2015)PVM SK | 56.53R:0.56 | 07.27 | 96 | |
| 7 | 2 | Császár Armand (2014)Siklósi SE | 59.41 | 10.15 | 83 |