2010 Pan Pacific Swimming Championships – Men's 4 × 100 metre medley relay
# 2010 Pan Pacific Swimming Championships – Men's 4 × 100 metre medley relay

The men's 4 × 100 metre medley relay competition at the 2010 Pan Pacific Swimming Championships took place on August 21 at the William Woollett Jr. Aquatics Center. The last champion was the United States.

## Records

Prior to this competition, the existing world and Pan Pacific records were as follows:

| World record | United States (USA) Aaron Peirsol (52.19) Eric Shanteau (58.57) Michael Phelps (49.72) David Walters (46.80) | 3:27.28 | Rome, Italy | August 2, 2009 |
| - | - | - | - | - |
| Pan Pacific Championships record | United States (USA) Aaron Peirsol (53.74) Brendan Hansen (59.18) Ian Crocker (50.92) Jason Lezak (47.95) | 3:31.79 | Victoria, Canada | August 20, 2006 |

## Results

All times are in minutes and seconds.

| KEY: | q | Fastest non-qualifiers | Q | Qualified | CR | Championships record | NR | National record | PB | Personal best | SB | Seasonal best |
| - | - | - | - | - | - | - | - | - | - | - | - | - |

### Heats

Heats weren't performed, as only seven teams had entered.

### Final

The final was held on August 21, at 20:27.

| Rank | Lane | Name | Nationality | Time |
| - | - | - | - | - |
| | 4 | Aaron Peirsol (53.91) Mark Gangloff (1:00.45) Michael Phelps (50.58) Nathan Adrian (47.54) | United States | 3:32.48 |
| | 6 | Junya Koga (53.87) Kosuke Kitajima (59.18) Masayuki Kishida (52.07) Takuro Fujii (48.78) | Japan | 3:33.90 |
| | 5 | Ashley Delaney (53.97) Christian Sprenger (1:01.21) Geoff Huegill (51.45) Kyle Richardson (48.92) | Australia | 3:35.55 |
| 4 | 3 | Guilherme Guido (55.05) Tales Cerdeira (1:01.29) Gabriel Mangabeira (52.69) César Cielo (47.83) | Brazil | 3:36.86 |
| 5 | 2 | Jake Tapp (55.86) Scott Dickens (1:01.17) Joe Bartoch (52.22) Brent Hayden (47.76) | Canada | 3:37.01 |
| 6 | 1 | Gareth Kean (54.94) Glenn Snyders (1:00.48) Moss Burmester (53.73) Carl O'Donnell (49.54) | New Zealand | 3:38.69 |
| 7 | 7 | Park Seon-Kwan (55.84) Choi Kyu-Woong (1:02.81) Jeong Doo-Hee (53.67) Park Minkyu (50.68) | South Korea | 3:43.00 |
