# Swimming at the 2024 World Aquatics Championships – Men's 100 metre breaststroke

The Men's 100 metre breaststroke competition at the 2024 World Aquatics Championships was held on 11 and 12 February 2024.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Adam Peaty (GBR) | 56.88 | Gwangju, South Korea | 21 July 2019 |
| Competition record | Adam Peaty (GBR) | 56.88 | Gwangju, South Korea | 21 July 2019 |

## Results
### Heats

The heats were started on 11 February at 11:10.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 8 | 4 | Nic Fink | United States | 59.19 | Q |
| 2 | 6 | 4 | Nicolò Martinenghi | Italy | 59.27 | Q |
| 3 | 8 | 3 | Adam Peaty | Great Britain | 59.34 | Q |
| 4 | 6 | 3 | Caspar Corbeau | Netherlands | 59.38 | Q |
| 5 | 8 | 5 | Lucas Matzerath | Germany | 59.43 | Q |
| 6 | 6 | 2 | Jake Foster | United States | 59.61 | Q |
| 6 | 7 | 4 | Arno Kamminga | Netherlands | 59.61 | Q |
| 8 | 7 | 5 | Melvin Imoudu | Germany | 59.72 | Q |
| 9 | 6 | 1 | Ilya Shymanovich | Neutral Independent Athletes | 59.81 | Q |
| 9 | 7 | 3 | Sam Williamson | Australia | 59.81 | Q |
| 11 | 7 | 2 | Andrius Šidlauskas | Lithuania | 59.84 | Q |
| 12 | 8 | 6 | Ludovico Viberti | Italy | 59.86 | Q |
| 13 | 7 | 7 | Dong Zhihao | China | 59.97 | Q |
| 14 | 8 | 2 | Choi Dong-yeol | South Korea | 1:00.15 | Q |
| 15 | 6 | 5 | Berkay Ömer Öğretir | Turkey | 1:00.27 | Q |
| 16 | 7 | 6 | Denis Petrashov | Kyrgyzstan | 1:00.47 | Q |
| 17 | 6 | 6 | James Wilby | Great Britain | 1:00.49 | |
| 18 | 8 | 7 | Bernhard Reitshammer | Austria | 1:00.50 | |
| 19 | 8 | 8 | Matti Mattsson | Finland | 1:00.57 | |
| 20 | 7 | 1 | Darragh Greene | Ireland | 1:00.70 | |
| 21 | 6 | 0 | Maksym Ovchinnikov | Ukraine | 1:00.72 | |
| 22 | 6 | 7 | Jan Kałusowski | Poland | 1:00.74 | |
| 23 | 6 | 8 | James Dergousoff | Canada | 1:00.77 | |
| 24 | 5 | 7 | Peter John Stevens | Slovenia | 1:00.87 | |
| 25 | 8 | 1 | Miguel de Lara | Mexico | 1:00.88 | |
| 26 | 8 | 0 | Jérémy Desplanches | Switzerland | 1:00.90 | |
| 27 | 6 | 9 | Carles Coll Martí | Spain | 1:01.50 | |
| 28 | 5 | 5 | Matthew Randle | South Africa | 1:01.80 | |
| 29 | 5 | 3 | Francisco Robalo | Portugal | 1:01.83 | |
| 30 | 4 | 2 | Alexandre Grand'Pierre | Haiti | 1:01.85 | |
| 31 | 8 | 9 | Tonislav Sabev | Bulgaria | 1:01.95 | |
| 32 | 5 | 8 | Xavier Ruiz | Puerto Rico | 1:02.05 | |
| 33 | 5 | 4 | Ronan Wantenaar | Namibia | 1:02.09 | |
| 34 | 7 | 9 | Vojtěch Netrh | Czech Republic | 1:02.13 | |
| 35 | 4 | 6 | Adam Chillingworth | Hong Kong | 1:02.44 | |
| 35 | 7 | 8 | Jorge Murillo | Colombia | 1:02.44 | |
| 37 | 5 | 6 | Arsen Kozhakhmetov | Kazakhstan | 1:02.53 | |
| 38 | 5 | 9 | Jadon Wuilliez | Antigua and Barbuda | 1:02.54 | |
| 39 | 5 | 1 | Julio Horrego | Honduras | 1:02.64 | |
| 40 | 7 | 0 | Phạm Thanh Bảo | Vietnam | 1:02.94 | |
| 41 | 4 | 3 | Likhith Selvaraj | India | 1:02.96 | |
| 42 | 3 | 7 | Patrick Pelegrina | Andorra | 1:03.08 | |
| 43 | 4 | 8 | Panayiotis Panaretos | Cyprus | 1:03.35 | |
| 44 | 3 | 5 | Adrian Robinson | Botswana | 1:03.42 | |
| 45 | 5 | 0 | Chao Man Hou | Macau | 1:03.40 | |
| 46 | 4 | 5 | Muhammad Raharjo | Indonesia | 1:03.46 | |
| 47 | 3 | 4 | Denis Svet | Moldova | 1:03.62 | |
| 48 | 5 | 2 | Amro Al-Wir | Jordan | 1:03.72 | |
| 49 | 4 | 1 | Daniils Bobrovs | Latvia | 1:03.85 | |
| 50 | 3 | 3 | Vicente Villanueva | Chile | 1:03.91 | |
| 51 | 3 | 6 | Giacomo Casadei | San Marino | 1:04.11 | |
| 52 | 4 | 0 | Tasi Limtiaco | Micronesia | 1:04.16 | |
| 53 | 3 | 0 | Jacob Story | Cook Islands | 1:04.32 | |
| 54 | 2 | 6 | Abobakr Abass | Sudan | 1:04.40 | |
| 55 | 1 | 6 | Munzer Kabbara | Lebanon | 1:04.54 | NR |
| 56 | 4 | 4 | Tomas Peribonio | Ecuador | 1:04.74 | |
| 57 | 2 | 4 | Matthew Lawrence | Mozambique | 1:04.75 | |
| 58 | 3 | 8 | Ashot Chakhoyan | Armenia | 1:04.92 | |
| 59 | 4 | 7 | Jonathan Raharvel | Madagascar | 1:05.08 | |
| 60 | 3 | 1 | Luis Weekes | Barbados | 1:06.27 | |
| 61 | 2 | 5 | Jonathan Chung | Mauritius | 1:06.31 | |
| 62 | 3 | 9 | Saud Ghali | Bahrain | 1:07.19 | |
| 63 | 2 | 1 | Omar Al-Hammadi | United Arab Emirates | 1:08.23 | |
| 64 | 1 | 5 | Thomas Chen | Papua New Guinea | 1:08.39 | |
| 65 | 2 | 7 | Osama Trabulsi | Syria | 1:08.62 | |
| 66 | 2 | 2 | Jayden Loran | Curaçao | 1:08.70 | |
| 67 | 3 | 2 | Roberto Bonilla | Guatemala | 1:09.46 | |
| 68 | 2 | 0 | Ghaith Hussein | Iraq | 1:10.28 | |
| 69 | 2 | 8 | Chadd Ng | Eswatini | 1:10.55 | |
| 70 | 1 | 8 | Fahim Anwari | Afghanistan | 1:10.86 | |
| 71 | 1 | 1 | Sébastien Kouma | Mali | 1:14.39 | |
| 72 | 1 | 0 | Mubal Azzam Ibrahim | Maldives | 1:14.58 | NR |
| 73 | 1 | 3 | Fodé Camara | Guinea | 1:16.17 | |
| 74 | 2 | 9 | Jion Hosei | Palau | 1:16.30 | |
| | 1 | 4 | Rashed Al-Tarmoom | Kuwait | Did not start | Did not start |
| | 1 | 7 | Jainny Pinto | São Tomé and Príncipe | Did not start | Did not start |
| | 2 | 3 | Micah Masei | American Samoa | Did not start | Did not start |
| | 4 | 9 | Abdul Aziz Al-Obaidly | Qatar | Did not start | Did not start |
| | 1 | 2 | Damien Shamambo | Zambia | Disqualified | Disqualified |

### Semifinals

The semifinals were started on 11 February at 19:50.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 5 | Adam Peaty | Great Britain | 58.60 | Q |
| 2 | 2 | 4 | Nic Fink | United States | 58.73 | Q |
| 3 | 2 | 6 | Arno Kamminga | Netherlands | 58.87 | Q |
| 4 | 1 | 4 | Nicolò Martinenghi | Italy | 59.13 | Q |
| 5 | 2 | 3 | Lucas Matzerath | Germany | 59.30 | Q |
| 6 | 1 | 5 | Caspar Corbeau | Netherlands | 59.33 | Q |
| 7 | 1 | 2 | Sam Williamson | Australia | 59.35 | Q |
| 8 | 2 | 2 | Ilya Shymanovich | Neutral Independent Athletes | 59.40 | Q |
| 9 | 1 | 3 | Jake Foster | United States | 59.48 | |
| 10 | 1 | 7 | Ludovico Viberti | Italy | 59.61 | |
| 11 | 1 | 1 | Choi Dong-yeol | South Korea | 59.74 | |
| 12 | 2 | 7 | Andrius Šidlauskas | Lithuania | 59.79 | |
| 13 | 1 | 8 | Denis Petrashov | Kyrgyzstan | 59.82 | |
| 14 | 1 | 6 | Melvin Imoudu | Germany | 1:00.08 | |
| 15 | 2 | 8 | Berkay Ömer Öğretir | Turkey | 1:00.18 | |
| 16 | 2 | 1 | Dong Zhihao | China | 1:00.45 | |

### Final

The final was held on 12 February at 19:02.
| Rank | Lane | Name | Nationality | Time |
| | 5 | Nic Fink | United States | 58.57 |
| | 6 | Nicolò Martinenghi | Italy | 58.84 |
| | 4 | Adam Peaty | Great Britain | 59.10 |
| 4 | 1 | Sam Williamson | Australia | 59.21 |
| 5 | 3 | Arno Kamminga | Netherlands | 59.22 |
| 6 | 8 | Ilya Shymanovich | Neutral Independent Athletes | 59.35 |
| 7 | 2 | Lucas Matzerath | Germany | 59.37 |
| 7 | 7 | Caspar Corbeau | Netherlands | 59.37 |