Swimming at the 2018 European Aquatics Championships – Men's 100 metre breaststroke
The Men's 100 metre breaststroke competition of the 2018 European Aquatics Championships was held on 3 and 4 August 2018. It was won by Adam Peaty in a world record time of 57.10.
Records
Prior to the competition, the existing world and championship records were as follows.| Name | Nation | Time | Location | Date | |
| World record European record | Adam Peaty | 57.13 | Rio de Janeiro | 7 August 2016 | |
| Championship record | Adam Peaty | 58.36 | London | 17 May 2016 |
The following new records were set during this competition.
| Date | Event | Name | Nationality | Time | Record |
| 3 August | Heat | Adam Peaty | 57.89 | CR | |
| 4 August | Final | Adam Peaty | 57.10 | WR, CR |
Results
Heats
The heats were started on 3 August at 10:46.Semifinals
The semifinals were held on 3 August at 17:39.Semifinal 1
Semifinal 2
Swim-off
The swim-off was held on 3 August at 18:34.| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Kirill Prigoda | 59.39 | Q | |
| 2 | 5 | Darragh Greene | 1:00.44 |
Final
The final was held on 4 August at 17:13.| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Adam Peaty | 57.10 | WR | ||
| 5 | James Wilby | 58.64 | |||
| 3 | Anton Chupkov | 59.06 | |||
| 4 | 8 | Kirill Prigoda | 59.20 | ||
| 5 | 6 | Fabio Scozzoli | 59.61 | ||
| 6 | 7 | Andrius Šidlauskas | 59.62 | ||
| 7 | 2 | Arno Kamminga | 59.69 | ||
| 8 | 1 | Čaba Silađi | 1:00.15 |