| Final | team | time | +time | L | | | 1. Yang Sun |  CHN | 3:40.14 | OR | 04 | Stats | | 2. Taehwan Park |  KOR | 3:42.06 | +1.92s | 06 | Stats | | 3. Peter Vanderkaay |  USA | 3:44.69 | +4.55s | 05 | Stats | | 4. Yun Hao | CHN | 3:46.02 | +5.88s | 07 | Stats | | 5. Conor Dwyer | USA | 3:46.39 | +6.25s | 03 | Stats | | 6. Gergo Kis |  HUN | 3:47.03 | +6.89s | 02 | Stats | | 7. David Carry |  GBR | 3:48.62 | +8.48s | 08 | Stats | | 8. Ryan Napoleon |  AUS | 3:49.25 | +9.11s | 01 | Stats |
|
|
 | | Yang Sun |
|
|
| Heat 4 | time | +time | L | Rk. | | | 1. Yang Sun | CHN | 3:45.07 | - | 04 | 1. | Times | | 2. Peter Vanderkaay | USA | 3:45.80 | 0.73s | 05 | 2. | Times | | 3. Conor Dwyer | USA | 3:46.24 | 1.17s | 07 | 3. | Times | | 4. Yun Hao | CHN | 3:46.88 | 1.81s | 03 | 6. | Times | | 5. Pal Joensen |  DEN | 3:47.36 | 2.29s | 06 | 10. | Times | | 6. Cristian Quintero Valero |  VEN | 3:50.44 | 5.37s | 08 | 16. | Times | | 7. Samuel Pizzetti |  ITA | 3:50.93 | 5.86s | 02 | 18. | Times | | 8. Dominik Meichtry |  SUI | 3:51.34 | 6.27s | 01 | 19. | Times |
| Heat 3 | time | +time | L | Rk. | | | 1. Taehwan Park | KOR | 3:46.68 | - | 04 | 4. | Times | | 2. Gergo Kis | HUN | 3:46.77 | 0.09s | 02 | 5. | Times | | 3. Ryan Napoleon | AUS | 3:47.01 | 0.33s | 05 | 7. | Times | | 4. David Carry | GBR | 3:47.25 | 0.57s | 06 | 8. | Times | | 5. David McKeon | AUS | 3:48.57 | 1.89s | 03 | 14. | Times | | 6. Sergii Frolov |  UKR | 3:50.63 | 3.95s | 01 | 17. | Times | | 7. Matias Koski |  FIN | 3:54.96 | 8.28s | 08 | 22. | Times | | 8. Heerden Herman |  RSA | 3:57.28 | 10.60s | 07 | 25. | Times |
| Heat 2 | time | +time | L | Rk. | | | 1. Ryan Cochrane |  CAN | 3:47.26 | - | 05 | 9. | Times | | 2. Robbie Renwick | GBR | 3:47.44 | 0.18s | 03 | 11. | Times | | 3. Mads Glaesner | DEN | 3:48.27 | 1.01s | 06 | 12. | Times | | 4. Paul Biedermann |  GER | 3:48.50 | 1.24s | 04 | 13. | Times | | 5. Matthew Stanley |  NZL | 3:49.44 | 2.18s | 02 | 15. | Times | | 6. Egor Degtyarev |  RUS | 3:52.33 | 5.07s | 07 | 20. | Times | | 7. Dorde Markovic |  SRB | 3:55.35 | 8.09s | 08 | 23. | Times | | 8. Juan Martin Pereyra |  ARG | 3:56.76 | 9.50s | 01 | 24. | Times |
| Heat 1 | time | +time | L | Rk. | | | 1. Mateusz Sawrymowicz |  POL | 3:53.33 | - | 04 | 21. | Times | | 2. Mateo de Angulo Velasco |  COL | 3:57.76 | 4.43s | 05 | 26. | Times | | 3. Ahmed Gebrel |  PLE | 4:08.51 | 15.18s | 06 | 27. | Times | | 4. Allan Gutierrez Castro |  HON | 4:09.10 | 15.77s | 03 | 28. | Times |
|
|
|
| | F | | Heat 4 | 4 | | Heat 3 | 4 | | Heat 2 | | Heat 1 |
|
| Total eligible to participate 30 swimmers |
| Olympic Qualifying Time - 3:48.93 - 10+8 | | David McKeon | AUS | 14. | Ryan Napoleon | AUS | 8. | | Hao Yun | CHN | 4. | Sun Yang | CHN | 1. | | Robert Renwick | GBR | 11. | David Carry | GBR | 7. | | Peter Vanderkaay | USA | 3. | Conor Dwyer | USA | 5. | | Mads Glæsner | DEN | 12. | Pal Joensen | DEN | 10. | | Ryan Cochrane | CAN | 9. | | Paul Biedermann | GER | 13. | | Gergő Kis | HUN | 6. | | Samuel Pizzetti | ITA | 18. | | Park Tae-Hwan | KOR | 2. | | Matthew Stanley | NZL | 15. | | Oussama Mellouli | TUN | DNS | | Heerden Herman | RSA | 25. |
|
| Olympic Selection Time - 3:54.13 - 9 | | Egor Degtyarev | RUS | 3:48.94 | 20. | | Dominik Meichtry | SUI | qoe | 19. | | Sergiy Frolov | UKR | qoe | 17. | | Juan Martín Pereyra | ARG | 3:51.03 | 24. | | Cristian Quintero | VEN | 3:52.51 | 16. | | Matias Koski | FIN | qoe | 22. | | Djordje Markovic | SRB | 3:52.58 | 23. | | Mateusz Sawrymowicz | POL | qoe | 21. | | Mateo de Angulo | COL | 3:53.66 | 26. | | no other available swimmers |
|
| Wildcard Places - 3 | | Allan Gutierrez | HON | 28. | | Gebrel Ahmed | PLE | 27. | | Sebastian Jahnsen | PER | DNS |
|
| Olympic Qualification time | time | place | date | birth | | 1. Yang Sun | CHN | 3:40.29 | Rizhao (CHN) | 21.09.2011 | 01/12/1991 | | 2. Taehwan Park | KOR | 3:42.04 | Shanghai (CHN) | 24.07.2011 | 27/09/1989 | | 3. Paul Biedermann | GER | 3:44.14 | Shanghai (CHN) | 24.07.2011 | 07/08/1986 | | 4. Peter Vanderkaay | USA | 3:44.83 | Shanghai (CHN) | 24.07.2011 | 12/02/1984 | | 5. Ryan Napoleon | AUS | 3:45.16 | Sydney (AUS) | 01.04.2011 | 26/05/1990 | | 6. Ryan Cochrane | CAN | 3:45.17 | Shanghai (CHN) | 24.07.2011 | 29/10/1988 | | 7. Ous Mellouli | TUN | 3:45.31 | Shanghai (CHN) | 24.07.2011 | 16/02/1984 | | 8. Yun Hao | CHN | 3:46.01 | Shaoxing (CHN) | 01.04.2012 | 23/06/1995 | | 9. David Mckeon | AUS | 3:46.36 | Adelaide (AUS) | 15.03.2012 | 25/07/1992 | | 10.Robbie Renwick | GBR | 3:46.73 | London (GBR) | 03.03.2012 | 21/07/1988 | | 11.Pal Joensen | DEN | 3:46.84 | Bronshoj (DEN) | 22.03.2012 | 10/12/1990 | | 12.Mads Glaesner | DEN | 3:46.93 | Bronshoj (DEN) | 22.03.2012 | 18/10/1988 | | 13.Samuel Pizzetti | ITA | 3:47.12 | Shanghai (CHN) | 24.07.2011 | 16/10/1986 | | 14.Gergo Kis | HUN | 3:47.26 | Shanghai (CHN) | 24.07.2011 | 19/01/1988 | | 15.Matthew Stanley | NZL | 3:47.67 | Auckland (NZL) | 25.03.2012 | 15/01/1992 | | 16.Conor Dwyer | USA | 3:47.83 | Omaha (USA) | 25.06.2012 | 10/01/1989 | | 17.David Carry | GBR | 3:48.36 | London (GBR) | 03.03.2012 | 08/10/1981 | | 18.Heerden Herman | RSA | 3:48.57 | Durban (RSA) | 16.04.2012 | 20/12/1990 |
|
|
| 
London 2012