# Swimming at the 2023 World Aquatics Championships – Men's 50 metre breaststroke

The men's 50 metre breaststroke competition at the 2023 World Aquatics Championships was held on 25 and 26 July 2023.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Adam Peaty (GBR) | 25.95 | Budapest, Hungary | 25 July 2017 |
| Competition record | Adam Peaty (GBR) | 25.95 | Budapest, Hungary | 25 July 2017 |

## Results
### Heats

The heats were started on 25 July at 10:32.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | 5 | Qin Haiyang | China | 26.34 | Q, AS |
| 2 | 7 | 4 | Nicolò Martinenghi | Italy | 26.64 | Q |
| 3 | 5 | 4 | Sun Jiajun | China | 26.76 | Q |
| 3 | 6 | 3 | Samuel Williamson | Australia | 26.76 | Q |
| 5 | 7 | 5 | João Gomes Júnior | Brazil | 26.81 | Q |
| 6 | 6 | 4 | Nic Fink | United States | 26.91 | Q |
| 7 | 5 | 3 | Lucas Matzerath | Germany | 26.94 | Q |
| 8 | 5 | 5 | Simone Cerasuolo | Italy | 27.06 | Q |
| 9 | 7 | 3 | Bernhard Reitshammer | Austria | 27.11 | Q |
| 10 | 5 | 2 | Caspar Corbeau | Netherlands | 27.15 | Q |
| 11 | 7 | 7 | Peter John Stevens | Slovenia | 27.20 | Q |
| 12 | 7 | 1 | Arkadios Aspougalis | Greece | 27.23 | Q |
| 13 | 7 | 2 | Emre Sakçı | Turkey | 27.28 | Q |
| 14 | 7 | 6 | Michael Houlie | South Africa | 27.31 | Q |
| 15 | 6 | 6 | Yuya Hinomoto | Japan | 27.35 | Q |
| 16 | 5 | 6 | Valentin Bayer | Austria | 27.36 | Q |
| 17 | 6 | 1 | Miguel de Lara | Mexico | 27.38 | NR |
| 18 | 6 | 8 | Mikel Schreuders | Aruba | 27.47 | |
| 19 | 6 | 7 | Choi Dong-yeol | South Korea | 27.48 | |
| 19 | 7 | 0 | Denis Petrashov | Kyrgyzstan | 27.48 | |
| 21 | 5 | 1 | James Dergousoff | Canada | 27.53 | |
| 22 | 4 | 5 | Darragh Greene | Ireland | 27.54 | |
| 23 | 6 | 0 | Joshua Gilbert | New Zealand | 27.59 | |
| 24 | 7 | 8 | Jorge Murillo | Colombia | 27.71 | |
| 25 | 7 | 9 | Maksym Ovchinnikov | Ukraine | 27.78 | |
| 26 | 5 | 0 | Youssef El-Kamash | Egypt | 27.80 | |
| 27 | 4 | 1 | Chao Man Hou | Macau | 27.84 | |
| 28 | 5 | 7 | Andrius Šidlauskas | Lithuania | 27.98 | |
| 29 | 6 | 2 | Olli Kokko | Finland | 27.99 | |
| 30 | 4 | 2 | Nicholas Lia | Norway | 28.09 | |
| 30 | 4 | 3 | Jadon Wuilliez | Antigua and Barbuda | 28.09 | NR |
| 32 | 5 | 8 | Ronan Wantenaar | Namibia | 28.24 | |
| 33 | 3 | 4 | Mariano Lazzerini | Chile | 28.44 | |
| 34 | 4 | 6 | Maximillian Wei Ang | Singapore | 28.51 | |
| 35 | 4 | 4 | Panayiotis Panaretos | Cyprus | 28.55 | |
| 36 | 4 | 8 | Adrian Robinson | Botswana | 28.67 | |
| 37 | 5 | 9 | Andrew Goh | Malaysia | 28.75 | |
| 38 | 4 | 0 | Andres Martijena | Dominican Republic | 28.86 | |
| 39 | 6 | 9 | Muhammad Dwiky Raharjo | Indonesia | 28.89 | |
| 40 | 3 | 3 | Tasi Limtiaco | Micronesia | 28.95 | |
| 41 | 3 | 9 | Julio Calero Suarez | Cuba | 28.97 | |
| 42 | 4 | 9 | Matthew Lawrence | Mozambique | 29.02 | |
| 43 | 3 | 5 | Luka Eradze | Georgia | 29.06 | |
| 44 | 2 | 8 | Alexandre Grand'Pierre | Haiti | 29.10 | |
| 45 | 4 | 7 | Phạm Thanh Bảo | Vietnam | 29.17 | |
| 46 | 3 | 8 | Ashot Chakhoyan | Armenia | 29.46 | |
| 47 | 3 | 6 | Giacomo Casadei | San Marino | 29.84 | |
| 48 | 3 | 0 | Zach Moyo | Zambia | 30.05 | |
| 49 | 3 | 2 | Shane Cadogan | Saint Vincent and the Grenadines | 30.23 | |
| 50 | 3 | 1 | Jayden Loran | Curaçao | 30.32 | |
| 51 | 2 | 1 | Hendrik Powdar | Suriname | 30.75 | |
| 52 | 3 | 7 | Sebastien Kouma | Mali | 31.03 | |
| 53 | 2 | 2 | Chadd Ng Chiu Hing Ning | Eswatini | 32.37 | |
| 54 | 2 | 4 | Slava Sihanouvong | Laos | 32.93 | |
| 55 | 1 | 5 | Anthony Deleon | Northern Mariana Islands | 33.05 | |
| 56 | 2 | 5 | Fodé Amara Camara | Guinea | 33.42 | NR |
| 57 | 2 | 3 | Jion Hosei | Palau | 35.01 | |
| 58 | 2 | 7 | Hamzah Mayas | Yemen | 40.35 | |
| 59 | 2 | 6 | Ousman Jobe | Gambia | 41.77 | |
| | 1 | 4 | Hilal Hemed Hilal | Tanzania | DSQ | DSQ |
| | 2 | 0 | Abdulla Khalid Jamal | Bahrain | DSQ | DSQ |
| | 1 | 3 | Ibrahim Kamara | Sierra Leone | DNS | DNS |

### Semifinals

The semifinals were held on 25 July at 20:34.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Qin Haiyang | China | 26.20 | Q, AS |
| 2 | 1 | 4 | Nicolò Martinenghi | Italy | 26.74 | Q |
| 3 | 2 | 5 | Sun Jiajun | China | 26.78 | Q |
| 4 | 2 | 6 | Lucas Matzerath | Germany | 26.89 | Q |
| 5 | 2 | 3 | João Gomes Júnior | Brazil | 26.90 | Q |
| 6 | 1 | 3 | Nic Fink | United States | 26.95 | Q |
| 7 | 2 | 7 | Peter John Stevens | Slovenia | 27.04 | Q |
| 8 | 1 | 5 | Samuel Williamson | Australia | 27.06 | Q |
| 9 | 1 | 6 | Simone Cerasuolo | Italy | 27.07 | |
| 10 | 1 | 2 | Caspar Corbeau | Netherlands | 27.21 | |
| 11 | 2 | 2 | Bernhard Reitshammer | Austria | 27.25 | |
| 11 | 2 | 8 | Yuya Hinomoto | Japan | 27.25 | |
| 13 | 2 | 1 | Emre Sakçı | Turkey | 27.32 | |
| 14 | 1 | 8 | Valentin Bayer | Austria | 27.45 | |
| 15 | 1 | 7 | Arkadios Aspougalis | Greece | 27.50 | |
| 16 | 1 | 1 | Michael Houlie | South Africa | 27.57 | |

### Final

The final was held on 26 July at 21:01.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Qin Haiyang | China | 26.29 |
| | 7 | Nic Fink | United States | 26.59 |
| | 3 | Sun Jiajun | China | 26.79 |
| 4 | 8 | Samuel Williamson | Australia | 26.82 |
| 5 | 5 | Nicolò Martinenghi | Italy | 26.84 |
| 6 | 6 | Lucas Matzerath | Germany | 26.94 |
| 7 | 2 | João Gomes Júnior | Brazil | 26.97 |
| 8 | 1 | Peter John Stevens | Slovenia | 27.08 |