# Swimming at the 1984 Summer Olympics – Men's 4 × 100 metre medley relay

The final of the men's 4 × 100 metre medley relay event at the 1984 Summer Olympics was held in Los Angeles, California, on August 4, 1984. 24 teams participated in the heats, with the fastest eight qualifying for the final.

## Records

Prior to this competition, the existing world and Olympic records were as follows.
| World record | United States (USA) Rick Carey (55.60) Steve Lundquist (1:02.01) Matt Gribble (53.47) Rowdy Gaines (49.34) | 3:40.42 | Caracas, Venezuela | 22 August 1983 |
| Olympic record | United States (USA) John Naber (55.89) John Hencken (1:02.50) Matt Vogel (54.26) Jim Montgomery (49.57) | 3:42.22 | Montreal, Canada | 22 July 1976 |
The following new world and Olympic records were set during this competition.
| Date | Event | Name | Nationality | Time | Record |
| 4 August | Final | Rick Carey (55.41) Steve Lundquist (1:01.86) Pablo Morales (52.87) Rowdy Gaines (49.16) | United States | 3:39.30 | WR |

## Results
### Heats

Rule: The eight fastest teams advance to the final (Q).
| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 3 | 5 | Australia | Mark Kerry (57.41) Peter Evans (1:02.67) Jon Sieben (54.24) Neil Brooks (49.61) | 3:43.93 | Q |
| 2 | 3 | 4 | United States | Dave Wilson (57.06) Richard Schroeder (1:02.66) Mike Heath (54.60) Tom Jager (50.01) | 3:44.33 | Q |
| 3 | 1 | 4 | Canada | Mike West (58.11) Victor Davis (1:02.54) Tom Ponting (54.22) Sandy Goss (51.25) | 3:46.12 | Q |
| 4 | 3 | 3 | Switzerland | Patrick Ferland (58.68) Étienne Dagon (1:03.87) Théophile David (55.24) Dano Halsall (50.34) | 3:48.13 | Q |
| 5 | 2 | 4 | West Germany | Stefan Peter (58.43) Gerald Mörken (1:05.49) Andreas Behrend (55.23) Alexander Schowtka (50.60) | 3:49.75 | Q |
| 6 | 3 | 8 | Sweden | Michael Söderlund (58.79) Peter Berggren (1:05.22) Bengt Baron (54.98) Per Johansson (50.77) | 3:49.76 | Q |
| 7 | 2 | 5 | Great Britain | Neil Harper (59.12) Adrian Moorhouse (1:04.95) Andy Jameson (54.66) David Lowe (51.13) | 3:49.86 | Q |
| 8 | 3 | 6 | Japan | Daichi Suzuki (58.31) Shigehiro Takahashi (1:04.05) Taihei Saka (55.66) Hiroshi Sakamoto (52.12) | 3:50.14 | Q, NR |
| 9 | 1 | 1 | New Zealand | Paul Kingsman (58.73) Brett Austin (1:04.83) Anthony Mosse (54.93) Gary Hurring (52.07) | 3:50.56 | NR |
| 10 | 1 | 5 | France | Frédéric Delcourt (59.11) Thierry Pata (1:04.91) Xavier Savin (55.98) Stéphan Caron (50.75) | 3:50.75 | |
| 11 | 2 | 6 | China | Wang Hao (58.87) Jin Fu (1:04.74) Zheng Jian (56.78) Mu Lat (51.32) | 3:51.71 | |
| 12 | 2 | 1 | Brazil | Ricardo Prado (58.82) Luiz Carvalho (1:06.21) Marcelo Jucá (57.24) Cyro Delgado (51.22) | 3:53.49 | |
| 13 | 1 | 3 | Venezuela | Giovanni Frigo (59.85) Jorge Henão (1:08.54) Rafael Vidal (55.51) Alberto Mestre (51.22) | 3:55.12 | |
| 14 | 1 | 6 | Mexico | Ernesto Vela (1:01.08) Eduardo Morillo (1:06.02) Carlos Romo (57.13) Ramiro Estrada (51.88) | 3:56.11 | |
| 15 | 3 | 2 | Egypt | Sharif Nour (59.09) Ayman Nadim (1:09.53) Ahmed Said (57.73) Mohamed Youssef (52.96) | 3:59.31 | |
| 16 | 2 | 2 | Singapore | David Lim Fong Jock (1:00.59) Oon Jin Teik (1:08.25) Ang Peng Siong (57.83) Oon Jin Gee (53.40) | 4:00.07 | |
| 17 | 3 | 1 | Jamaica | Allan Marsh (1:00.53) Andrew Phillips (1:09.63) Deryck Marks (1:00.35) Gordon Scarlett (54.84) | 4:05.35 | |
| 18 | 2 | 7 | Virgin Islands | Erik Rosskopf (1:03.71) Harrell Woolard (1:13.50) Scott Newkirk (1:02.70) Collier Woolard (56.27) | 4:16.18 | |
| 19 | 1 | 7 | Guatemala | Ernesto José Degenhart (1:05.10) Fernando Marroquin (1:09.91) Roberto Granados (1:03.35) Rodrigo Leal (58.58) | 4:16.94 | |
| 20 | 1 | 8 | Honduras | Salvador Covelo (1:08.53) David Palma (1:12.56) Juan José Piño (1:02.62) Rodolfo Torres (59.01) | 4:22.72 | |
| | 2 | 3 | Italy | Paolo Falchini (58.93) Gianni Minervini (1:03.78) Fabrizio Rampazzo (55.80) Marcello Guarducci | DSQ | |
| | 1 | 2 | Turkey | | DNS | |
| | 2 | 8 | Lebanon | | DNS | |
| | 3 | 7 | Hong Kong | | DNS | |

### Final

| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 5 | United States | Rick Carey (55.41) Steve Lundquist (1:01.86) Pablo Morales (52.87) Rowdy Gaines (49.16) | 3:39.30 | WR |
| | 3 | Canada | Mike West (56.61) Victor Davis (1:02.33) Tom Ponting (54.01) Sandy Goss (50.28) | 3:43.23 | NR |
| | 4 | Australia | Mark Kerry (57.12) Peter Evans (1:02.29) Glenn Buchanan (54.68) Mark Stockwell (49.16) | 3:43.25 | OC |
| 4 | 2 | West Germany | Stefan Peter (58.21) Gerald Mörken (1:03.55) Michael Gross (52.81) Dirk Korthals (49.69) | 3:44.26 | NR |
| 5 | 7 | Sweden | Bengt Baron (57.16) Peter Berggren (1:05.00) Thomas Lejdström (54.98) Per Johansson (49.99) | 3:47.13 | |
| 6 | 1 | Great Britain | Neil Harper (58.37) Adrian Moorhouse (1:03.61) Andy Jameson (54.10) Richard Burrell (51.31) | 3:47.39 | NR |
| 7 | 6 | Switzerland | Patrick Ferland (58.64) Étienne Dagon (1:03.70) Théophile David (55.34) Dano Halsall (50.25) | 3:47.93 | NR |
| | 8 | Japan | Daichi Suzuki (57.70) NR Shigehiro Takahashi (1:03.70) Taihei Saka (55.35) Hiroshi Sakamoto | DSQ | |