Swimming at the 2015 SEA Games – Men's 400 metre freestyle
# Swimming at the 2015 SEA Games – Men's 400 metre freestyle

The men's 400 metre freestyle competition of the swimming event at the 2015 SEA Games was held on 11 June at the OCBC Aquatic Centre in Kallang, Singapore.

## Records

Prior to this competition, the existing Asian and Games records were as follows:

| Asian record | Sun Yang (CHN) | 3:40.14 | London, Great Britain | 28 July 2012 |
| - | - | - | - | - |
| Games record | Daniel William Henry Bego (MAS) | 3:53.99 | Vientiane, Laos | 12 December 2009 |

The following records were established during the competition:

| Date | Event | Name | Nationality | Time | Record |
| - | - | - | - | - | - |
| 11 June | Final | Welson Sim Wee Sheng | Malaysia (MAS) | 3:53.97 | GR |

## Schedule

All times are Singapore Standard Time (UTC+08:00)

| Date | Time | Event |
| - | - | - |
| Thursday, 11 June 2015 | 09:12 | Heat 1 |
| Thursday, 11 June 2015 | 09:16 | Heat 2 |
| Thursday, 11 June 2015 | 19:48 | Final |

## Results

| KEY: | Q | Qualified | GR | Games record | NR | National record | PB | Personal best | SB | Seasonal best | WD | Withdrew | DNF | Did not finish |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |

### Heats

    Source: Heats results summary

The heats were held on 11 June.

**Heat 1**


    Source: Heat 1 results

Heat 1 was held on 11 June.

| Rank | Lane | Athletes | Time | Notes |
| - | - | - | - | - |
| 1 | 3 | Pang Sheng Jun (SIN) | 4:03.64 | Q |
| 2 | 4 | Daniel William Henry Bego (MAS) | 4:06.05 | Q |
| 3 | 5 | Hoàng Quý Phước (VIE) | 4:06.71 | Q |
| 4 | 7 | Jose Joaquin Gonzalez (PHI) | 4:09.07 | |
| 5 | 2 | Satrio Bagaskara Gunadi Putra (INA) | 4:09.27 | |
| 6 | 6 | Sarit Tiewong (THA) | 4:09.38 | |

**Heat 2**


    Source: Heat 2 results

Heat 2 was held on 11 June.

| Rank | Lane | Athletes | Time | Notes |
| - | - | - | - | - |
| 1 | 4 | Welson Sim Wee Sheng (MAS) | 4:02.46 | Q |
| 2 | 7 | Jessie Khing Lacuna (PHI) | 4:03.13 | Q |
| 3 | 6 | Aflah Fadlan Prawira (INA) | 4:03.60 | Q |
| 4 | 3 | Tanakrit Kittiya (THA) | 4:04.14 | Q |
| 5 | 5 | Yeo Kai Quan (SIN) | 4:04.84 | Q |
| 6 | 2 | Lâm Quang Nhật (VIE) | 4:15.63 | |
| 7 | 1 | Pou Sovijja (CAM) | 4:21.57 | |

### Final

    Source: Final Results

The final was held on 11 June.

| Rank | Lane | Athletes | Time | Notes |
| - | - | - | - | - |
| | 4 | Welson Sim Wee Sheng (MAS) | 3:53.97 | GR |
| | 5 | Jessie Khing Lacuna (PHI) | 3:55.34 | |
| | 6 | Pang Sheng Jun (SIN) | 3:57.60 | |
| 4 | 1 | Daniel William Henry Bego (MAS) | 3:58.34 | |
| 5 | 8 | Hoàng Quý Phước (VIE) | 3:58.99 | |
| 6 | 2 | Tanakrit Kittiya (THA) | 3:59.13 | |
| 7 | 3 | Aflah Fadlan Prawira (INA) | 4:01.62 | |
| 8 | 7 | Yeo Kai Quan (SIN) | 4:04.64 | |
