Swimming at the 2015 World Aquatics Championships – Men's 400 metre freestyle

Prior to the competition, the existing world and championship records were as follows.

World record	Paul Biedermann (GER)	3:40.07	Rome, Italy	26 July 2009
Competition record	Paul Biedermann (GER)	3:40.07	Rome, Italy	26 July 2009

The heats were held at 09:48.^[2]

Rank	Heat	Lane	Name	Nationality	Time	Notes
1	6	4	Sun Yang	China	3:44.99	Q
2	6	5	James Guy	Great Britain	3:45.37	Q
3	6	6	Ryan Cochrane	Canada	3:45.86	Q
4	7	3	Connor Jaeger	United States	3:46.03	Q
5	4	4	Wojciech Wojdak	Poland	3:46.67	Q
6	6	7	Michael McBroom	United States	3:46.69	Q
7	7	1	Péter Bernek	Hungary	3:46.83	Q
8	6	1	Clemens Rapp	Germany	3:47.19	Q
9	6	2	Florian Vogel	Germany	3:47.34
10	7	5	David McKeon	Australia	3:47.36
11	7	4	Mack Horton	Australia	3:47.37
12	5	9	Filip Zaborowski	Poland	3:47.59
13	6	9	Henrik Christiansen	Norway	3:47.71
14	7	6	Nicholas Grainger	Great Britain	3:47.95
15	5	2	Ahmed Akram	Egypt	3:48.07	NR
16	5	8	Marwan El-Kamash	Egypt	3:48.15
17	7	9	Mads Glæsner	Denmark	3:48.78
18	7	2	Myles Brown	South Africa	3:48.86
19	6	3	Velimir Stjepanović	Serbia	3:49.49
20	5	1	Felix Auböck	Austria	3:50.04
21	4	8	Nezir Karap	Turkey	3:50.07
21	5	5	Miguel Durán	Spain	3:50.07
23	5	4	Jeremy Bagshaw	Canada	3:50.54
24	3	4	Cristian Quintero	Venezuela	3:50.89
25	7	0	Damien Joly	France	3:50.89
26	4	6	Li Yunqi	China	3:51.30
27	7	7	Andrea Mitchell D'Arrigo	Italy	3:51.31
28	3	3	Martin Bau	Slovenia	3:51.44
29	4	1	Marcelo Acosta	El Salvador	3:51.45
30	5	0	Ahmed Mathlouthi	Tunisia	3:51.46
31	4	5	Lander Hendrickx	Belgium	3:51.61
32	3	2	Richárd Nagy	Slovakia	3:51.63
33	5	7	David Brandl	Austria	3:51.83
34	5	6	Aleksandr Krasnykh	Russia	3:51.93
35	6	0	Tsubasa Amai	Japan	3:52.06
36	4	9	Ido Haber	Israel	3:52.08	NR
37	7	8	Ferry Weertman	Netherlands	3:52.18
38	3	5	Martin Naidich	Argentina	3:52.43
39	5	3	Mykhailo Romanchuk	Ukraine	3:52.76
40	4	7	Matias Koski	Finland	3:52.86
41	2	2	Christian Bayo	Puerto Rico	3:53.61
42	4	3	Serhiy Frolov	Ukraine	3:53.64
43	6	8	Jan Micka	Czech Republic	3:53.79
44	4	0	Jean-Baptiste Febo	Switzerland	3:54.47
45	2	6	Sven Arnar Saemundsson	Croatia	3:55.43
46	3	7	Alexei Sancov	Moldova	3:55.83
47	4	2	Matthew Stanley	New Zealand	3:56.71
48	3	6	Mateo de Angulo	Colombia	3:57.01
49	3	0	Tomas Peribonio	Ecuador	3:57.21
50	3	1	Yeo Kai Quan	Singapore	3:57.44
51	2	5	Alin Artimon	Romania	3:57.79
52	1	5	Khader Baqlah	Jordan	3:58.71
53	2	4	Welson Sim	Malaysia	3:58.75
54	2	0	Irakli Revishvili	Georgia	4:00.68
55	2	8	Luis Ventura	Mexico	4:00.79
56	2	1	Tanakrit Kittiya	Thailand	4:01.59
57	3	8	Jessie Lacuna	Philippines	4:01.61
58	2	3	Raphaël Stacchiotti	Luxembourg	4:01.63
59	2	7	Ensar Hajder	Bosnia and Herzegovina	4:02.41
60	3	9	Saurabh Sangvekar	India	4:02.57
61	2	9	Alex Sobers	Barbados	4:05.07
62	1	4	Iacovos Hadjiconstantinou	Cyprus	4:06.38
63	1	3	Geoffrey Butler	Cayman Islands	4:07.41
64	1	7	Klavio Meca	Albania	4:08.18
65	1	6	Ahmed Gebrel	Palestine	4:09.97
66	1	2	Brandon Schuster	Samoa	4:15.30
67	1	1	Haris Bandey	Pakistan	4:31.90
68	1	8	Andrianirina Lalanomena	Madagascar	4:49.08

 

The final was held at 17:42.^[3]

Rank	Lane	Name	Nationality	Time	Notes
	4	Sun Yang	China	3:42.58
	5	James Guy	Great Britain	3:43.75	NR
	3	Ryan Cochrane	Canada	3:44.59
4	6	Connor Jaeger	United States	3:44.81
5	1	Péter Bernek	Hungary	3:46.29
6	2	Wojciech Wojdak	Poland	3:46.81
7	8	Clemens Rapp	Germany	3:48.52
8	7	Michael McBroom	United States	3:51.94