# 2024 World Aquatics Swimming Championships (25 m) – Men's 400 metre individual medley

The Men's 400 metre individual medley competition of the 2024 World Aquatics Swimming Championships (25 m) was held on 14 December 2024.

## Records

Prior to the competition, the existing world and championship records were as follows:
| World record | Daiya Seto (JPN) | 3:54.81 | Las Vegas, United States of America | 20 December 2019 |
| Competition record | Ryan Lochte (USA) | 3:55.50 | Dubai, United Arab Emirates | 16 December 2010 |

## Results
### Heats

The heats were started at 9:28.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | 8 | Max Litchfield | Great Britain | 4:00.37 | Q |
| 2 | 3 | 4 | Ilya Borodin | Neutral Athletes B | 4:01.28 | Q |
| 3 | 4 | 9 | Tristan Jankovics | Canada | 4:02.01 | Q, NR |
| 4 | 4 | 2 | Carson Foster | United States | 4:02.11 | Q |
| 5 | 4 | 4 | Alberto Razzetti | Italy | 4:02.18 | Q |
| 6 | 3 | 5 | Kaito Tabuchi | Japan | 4:03.85 | Q |
| 7 | 4 | 6 | Trenton Julian | United States | 4:03.96 | Q |
| 8 | 3 | 6 | Apostolos Papastamos | Greece | 4:04.24 | Q |
| 9 | 4 | 5 | Daiya Seto | Japan | 4:05.45 | R |
| 10 | 4 | 3 | David Schlicht | Australia | 4:05.63 | R |
| 11 | 3 | 1 | Robert Badea | Romania | 4:06.42 | NR |
| 12 | 3 | 0 | Cedric Büssing | Germany | 4:06.73 | |
| 13 | 2 | 6 | Dominik Török | Hungary | 4:06.80 | |
| 14 | 4 | 1 | Gábor Zombori | Hungary | 4:07.25 | |
| 15 | 3 | 7 | Jakub Bursa | Czech Republic | 4:08.02 | |
| 16 | 3 | 3 | Huang Zhiwei | China | 4:08.87 | |
| 17 | 2 | 3 | Fu Kun-ming | Chinese Taipei | 4:09.36 | NR |
| 18 | 2 | 4 | Marius Toscan | Switzerland | 4:10.39 | |
| 19 | 3 | 2 | Darius Coman | Romania | 4:10.78 | |
| 20 | 4 | 0 | Richard Nagy | Slovakia | 4:11.09 | |
| 21 | 2 | 0 | Jarod Arroyo | Puerto Rico | 4:11.55 | |
| 22 | 1 | 5 | Jaouad Syoud | Algeria | 4:11.71 | NR |
| 23 | 4 | 8 | Samuel Lewis Brown | New Zealand | 4:12.33 | |
| 24 | 2 | 2 | Heorhii Lukashev | Ukraine | 4:12.44 | |
| 25 | 1 | 4 | Nguyễn Quang Thuấn | Vietnam | 4:12.94 | |
| 26 | 3 | 9 | Jack Cassin | Ireland | 4:12.96 | |
| 27 | 2 | 1 | Zackery Tay | Singapore | 4:13.98 | NR |
| 28 | 2 | 8 | Daniil Giourtzidis | Greece | 4:14.07 | |
| 29 | 1 | 3 | Juraj Barčot | Croatia | 4:14.51 | |
| 30 | 4 | 7 | He Yubo | China | 4:14.55 | |
| 31 | 1 | 1 | Kristaps Miķelsons | Latvia | 4:16.73 | |
| 31 | 2 | 5 | Belhassen Ben Miled | Tunisia | 4:16.73 | |
| 33 | 1 | 2 | Oliver Durand | Namibia | 4:16.99 | NR |
| 34 | 1 | 6 | Matheo Mateos | Paraguay | 4:17.95 | |
| 35 | 2 | 7 | Tan Khai Xin | Malaysia | 4:18.63 | |
| 36 | 2 | 9 | Kian Keylock | South Africa | 4:23.22 | |
| 37 | 1 | 7 | Sam Williamson | Bermuda | 4:23.25 | |
| 38 | 1 | 8 | Hussaine Taha | Oman | 4:36.34 | |

### Final

The final was held at 18:42.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 6 | Ilya Borodin | Neutral Athletes B | 3:56.83 | |
| | 6 | Carson Foster | United States | 3:57.45 | |
| | 2 | Alberto Razzetti | Italy | 3:58.83 | |
| 4 | 7 | Kaito Tabuchi | Japan | 4:00.43 | |
| 5 | 5 | Max Litchfield | Great Britain | 4:00.50 | |
| 6 | 3 | Tristan Jankovics | Canada | 4:00.57 | NR |
| 7 | 8 | Apostolos Papastamos | Greece | 4:04.26 | |
| 8 | 1 | Trenton Julian | United States | 4:05.81 | |