| Swimming – Men's 400 metre individual medley at the 2015 SEA Games | ||||||||||
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| Venue | OCBC Aquatic Centre | |||||||||
| Date | 9 June 2015 | |||||||||
| Competitors | 7 from 5 nations | |||||||||
| Medalists | ||||||||||
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The men's 400 metre individual medley competition of the swimming event at the 2015 SEA Games was held on 9 June at the OCBC Aquatic Centre in Kallang, Singapore. [1]
Prior to this competition, the existing Asian and Games records were as follows:
| Asian record |  Kosuke Hagino (JPN) | 4:07.61 | Niigata, Japan | 11 April 2013 |
| Games record |  Ratapong Sirisanont (THA) | 4:23.20 | Ho Chi Minh City, Vietnam | 6 December 2003 |
| Date | Time | Event |
|---|---|---|
| Tuesday, 9 June 2015 | 19:53 | Final |
| KEY: | Q | Qualified | GR | Games record | NR | National record | PB | Personal best | SB | Seasonal best | WD | Withdrew | DNF | Did not finish |
The final was held on 9 June.
| Rank | Lane | Athletes | Time | Notes |
|---|---|---|---|---|
 | 5 |  Quah Zheng Wen (SIN) | 4:23.50 | |
 | 3 | Pang Sheng Jun (SIN) | 4:24.81 | |
 | 4 |  Trần Duy Khôi (VIE) | 4:26.29 | |
| 4 | 2 |  Aflah Fadlan Prawira (INA) | 4:29.79 | |
| 5 | 1 |  Jose Joaquin Gonzalez (PHI) | 4:31.37 | |
| 6 | 6 |  Jiarapong Sangkhawat (THA) | 4:36.57 | |
| 7 | 7 | Muhammad Hamgari (INA) | 4:39.02 |
Joseph Isaac Schooling is a Singaporean former professional swimmer who specialised in butterfly, freestyle, and medley events. He was the gold medalist in the 100m butterfly at the 2016 Olympics, achieving Singapore's first ever Olympic gold medal. His winning time of 50.39s broke multiple records at the National, Southeast Asian, Asian, and Olympic levels.
Nguyễn Thị Ánh Viên is a Vietnamese swimmer. She swam for Vietnam at the 2016 Olympics. At the 2014 Asian Games, she won Vietnam's first-ever medal in swimming. She has been named Vietnam's Athlete of the Year in both 2013 and 2014. By the end of 2014, she holds the Vietnamese records in 14 of the 17 long-course individual events. At the 2012 Olympics, she swam the 200 Backstroke and the 400 Individual Medley. In addition to her competitive swimming career, Ánh Viên also serves in the Vietnamese army in the rank of major.
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The women's 200 metre individual medley competition of the swimming event at the 2015 SEA Games was held on 7 June at the OCBC Aquatic Centre in Kallang, Singapore.
The men's 200 metre individual medley competition of the swimming event at the 2015 SEA Games was held on 10 June at the OCBC Aquatic Centre in Kallang, Singapore.
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