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

The Men's 400 metre freestyle competition of the 2024 World Aquatics Swimming Championships (25 m) was held on 12 December 2024.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Yannick Agnel (FRA) | 3:32.25 | Angers, France | 15 November 2012 |
| Competition record | Danas Rapšys (LTU) | 3:34.01 | Hangzhou, China | 11 December 2018 |

## Results
### Heats

The heats were started at 10:29.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 8 | Elijah Winnington | Australia | 3:37.22 | Q |
| 2 | 4 | 8 | Carson Foster | United States | 3:37.86 | Q |
| 3 | 5 | 4 | Lucas Henveaux | Belgium | 3:37.87 | Q |
| 4 | 6 | 2 | Zalán Sárkány | Hungary | 3:38.43 | Q |
| 5 | 5 | 6 | Roman Fuchs | France | 3:38.51 | Q |
| 6 | 6 | 3 | Ahmed Jaouadi | Tunisia | 3:38.57 | Q |
| 7 | 5 | 1 | Petar Mitsin | Bulgaria | 3:38.94 | Q, NR |
| 8 | 6 | 4 | Kieran Smith | United States | 3:39.14 | Q |
| 9 | 6 | 5 | Danas Rapšys | Lithuania | 3:39.60 | R |
| 10 | 6 | 6 | Victor Johansson | Sweden | 3:39.85 | R |
| 11 | 4 | 6 | Kamil Sieradzki | Poland | 3:40.29 | |
| 12 | 6 | 7 | Savelii Luzin | Neutral Athletes B | 3:40.33 | |
| 13 | 6 | 0 | Luca De Tullio | Italy | 3:41.50 | |
| 14 | 6 | 8 | Kaito Tabuchi | Japan | 3:41.58 | |
| 15 | 5 | 7 | Dimitrios Markos | Greece | 3:41.95 | |
| 16 | 4 | 4 | Carlos Garach | Spain | 3:42.18 | |
| 17 | 3 | 4 | Sašo Boškan | Slovenia | 3:42.93 | |
| 18 | 3 | 3 | Alex Axon | Canada | 3:43.64 | |
| 18 | 5 | 5 | Antonio Djakovic | Switzerland | 3:43.64 | |
| 20 | 4 | 2 | Juan Morales | Colombia | 3:44.03 | |
| 21 | 4 | 5 | Nathan Wiffen | Ireland | 3:44.05 | |
| 22 | 5 | 9 | Roman Akimov | Neutral Athletes B | 3:44.25 | |
| 23 | 6 | 9 | Khiew Hoe Yean | Malaysia | 3:44.69 | |
| 24 | 5 | 3 | Xu Yizhou | China | 3:44.90 | |
| 25 | 4 | 3 | Arno Kruger | South Africa | 3:45.28 | |
| 26 | 3 | 0 | Joaquín Vargas | Peru | 3:46.16 | |
| 27 | 3 | 2 | Ben Littlejohn | New Zealand | 3:47.53 | |
| 28 | 2 | 2 | Niko Janković | Croatia | 3:47.77 | |
| 29 | 5 | 0 | Kim Jun-woo | South Korea | 3:48.09 | |
| 30 | 4 | 1 | Galymzhan Balabek | Kazakhstan | 3:48.31 | |
| 31 | 3 | 6 | Andrei Proca | Romania | 3:48.87 | |
| 32 | 4 | 0 | José Paulo Lopes | Portugal | 3:49.11 | |
| 33 | 3 | 8 | Richard Nagy | Slovakia | 3:50.21 | |
| 34 | 4 | 7 | Muhammed Yusuf Özden | Turkey | 3:50.35 | |
| 35 | 6 | 1 | Lee Ho-joon | South Korea | 3:50.75 | |
| 36 | 2 | 4 | Kenan Dračić | Bosnia and Herzegovina | 3:50.77 | |
| 37 | 3 | 5 | Caleb Romero | Puerto Rico | 3:51.15 | |
| 38 | 2 | 1 | Adrian Eichler | Philippines | 3:51.62 | NR |
| 39 | 3 | 7 | Wang Yi Shun | Hong Kong | 3:52.96 | |
| 40 | 2 | 6 | Nikola Gjuretanovski | North Macedonia | 3:53.05 | NR |
| 41 | 4 | 9 | Liggjas Joensen | Faroe Islands | 3:53.46 | |
| 42 | 2 | 3 | Kevin Teixeira | Andorra | 3:53.69 | NR |
| 43 | 2 | 5 | Omar Abbass | Syria | 3:53.79 | |
| 44 | 3 | 9 | Chirill Chirsanov | Moldova | 3:55.33 | |
| 45 | 2 | 7 | Alberto Vega | Costa Rica | 3:55.71 | NR |
| 46 | 2 | 0 | Timothy Leberl | Mauritius | 4:02.51 | |
| 47 | 1 | 4 | Vladimir Hernández | Cuba | 4:07.02 | |
| 48 | 2 | 9 | Andile Bekker | Botswana | 4:09.55 | |
| 49 | 2 | 8 | Arion Budima | Kosovo | 4:10.76 | |
| | 1 | 3 | Atharva Singh | Nepal | Did not start | Did not start |
| | 1 | 5 | Ali Jaafar | Iraq | Did not start | Did not start |
| | 3 | 1 | Max Litchfield | Great Britain | Did not start | Did not start |

### Final

The final was held at 19:13.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Elijah Winnington | Australia | 3:35.89 |
| | 5 | Carson Foster | United States | 3:36.31 |
| | 8 | Kieran Smith | United States | 3:36.31 |
| 4 | 3 | Lucas Henveaux | Belgium | 3:36.71 |
| 5 | 2 | Roman Fuchs | France | 3:38.31 |
| 6 | 6 | Zalán Sárkány | Hungary | 3:38.59 |
| 7 | 7 | Ahmed Jaouadi | Tunisia | 3:39.32 |
| 8 | 1 | Petar Mitsin | Bulgaria | 3:41.46 |