# Swimming at the 2003 World Aquatics Championships – Men's 4 × 100 metre freestyle relay

The Men's 4×100m Freestyle Relay event at the 10th FINA World Aquatics Championships swam on July 20, 2003. Preliminary heats swam in the morning session that day, with the top eight teams advancing to swim again in the Final that evening.
At the start of the event, the existing World (WR) and Championship (CR) records were:
* WR: 3:13.67 swum by Australia on September 16, 2000 in Sydney, Australia
* CR: 3:14.10 swum by Australia on July 22, 2001 in Fukuoka, Japan

## Results
### Final

| Rank | Nation | Swimmers | Time | Notes |
| 1 | Russia | Andrei Kapralov (49.21), Ivan Usov (48.69), Denis Pimankov (48.45), Alexander Popov (47.71) | 3:14.06 | CR |
| 2 | USA | Scott Tucker (49.57), Neil Walker (48.22), Ryan Wochomurka (49.12), Jason Lezak (47.89) | 3:14.80 | |
| 3 | France | Romain Barnier (49.75), Julien Sicot (49.41), Fabien Gilot (49.47), Frederick Bousquet (47.03) | 3:15.66 | |
| 4 | Australia | Ashley Callus (49.19), Todd Pearson (49.05), Adam Pine (49.45), Ian Thorpe (47.98) | 3:15.67 | |
| 5 | Germany | Jens Thiele (50.01), Torsten Spanneberg (48.14), Lars Conrad (49.12), Stefan Herbst (48.71) | 3:15.98 | |
| 6 | Italy | Lorenzo Vismara (49.46), Christian Galenda (49.08), Michele Scarica (49.32), Filippo Magnini (48.13) | 3:15.99 | |
| 7 | Canada | Yannick Lupien (50.16), Riley Janes (49.01), Mike Mintenko (48.78), Brent Hayden (48.88) | 3:16.83 | |
| 8 | South Africa | Darian Townsend (50.37), Roland Schoeman (49.24), Lyndon Ferns (50.26), Ryk Neethling (48.92) | 3:18.79 | |

### Preliminaries

| Rank | Heat/Lane | Nation | Swimmers | Time | Notes |
| 1 | H2 L7 | Russia | Andrei Kapralov, Dmitri Talepov Ivan Usov, Denis Pimankov | 3:16.17 | q |
| 2 | H4 L4 | United States | Randall Bal, Nate Dusing Ryan Wochomurka, Neil Walker | 3:16.98 | q |
| 3 | H3 L3 | France | Romain Barnier, Julien Sicot Fabien Gilot, Frédérick Bousquet | 3:17.51 | q |
| 4 | H2 L4 | Germany | Lars Conrad, Torsten Spanneberg Jens Thiele, Stefan Herbst | 3:17.53 | q |
| 5 | H2 L5 | Italy | Filippo Magnini, Michele Scarica Klaus Lanzarini, Christian Galenda | 3:17.66 | q |
| 6 | H4 L5 | Canada | Yannick Lupien, Mike Mintenko Riley Janes, Brent Hayden | 3:18.51 | q |
| 7 | H2 L3 | South Africa | Darian Townsend, Roland Schoeman Lyndon Ferns, Ryk Neethling | 3:18.73 | q |
| 8 | H3 L4 | Australia | Todd Pearson, Casey Flouch Antony Matkovich, Adam Pine | 3:18.79 | q |
| 9 | H3 L5 | Sweden | Eric la Fleur, Stefan Nystrand Lars Frölander, Mattias Ohlin | 3:19.22 | |
| 10 | H4 L3 | Netherlands | Johan Kenkhuis, Klaas Erik Zwering Gijs Damen, Ewout Holst | 3:19.36 | |
| 11 | H4 L6 | Great Britain | Chris Cozens, Alexander Scotcher Ross Davenport, Simon Burnett | 3:20.46 | |
| 12 | H3 L2 | Brazil | Gustavo Borges, Jader Souza Fernando Scherer, Carlos Jayme | 3:20.49 | |
| 13 | H2 L1 | Ukraine | Vyacheslav Shyrshov, Oleksandr Volynets Denys Syzonenko, Artem Ivanov | 3:21.16 | |
| 14 | H3 L7 | Lithuania | Rolandas Gimbutis, Saulius Binevičius Paulius Viktoravičius, Vytautas Janušaitis | 3:21.81 | |
| 15 | H2 L6 | Croatia | Mario Delač, Duje Draganja Ivan Mladina, Igor Čerenšek | 3:22.42 | |
| 16 | H3 L6 | China | Shaohua Huang, Yu Liu Hao Jin, Zuo Chen | 3:22.95 | |
| 17 | H4 L2 | Switzerland | Philipp Gilgen, Karel Novy Dominik Meichtry, Christoph Bühler | 3:22.97 | |
| 18 | H4 L1 | Greece | Alexandros Tsoltos, Spyridon Bitsakis Apostolos Tsagkarakis, Dimitros Manganas | 3:23.03 | |
| 19 | H2 L2 | South Korea | Min Sung, Min Suk Kim Yun Ho Koh, Kyu Chul Han | 3:24.38 | |
| 20 | H4 L8 | Venezuela | Luis Rojas, Oswaldo Quevedo Albert Subirats, Raymond Rosal | 3:25.92 | |
| 21 | H2 L8 | Estonia | Danil Haustov, Sven Schneider Ken Tomson, Martin Viilep | 3:27.42 | |
| 22 | H3 L8 | Uzbekistan | Ravil Nachaev, Alexander Agafonov Oleg Pukhnaty, Petr Vasilev | 3:29.04 | |
| 23 | H4 L7 | Portugal | Nuno Laurentino, Luis Monteiro Simão Morgado, Pedro Silva | 3:29.09 | |
| 24 | H3 L1 | Slovenia | Peter Mankoč, Blaž Medvešek Bojan Zdešar, Matjaž Markič | 3:29.51 | |
| 25 | H1 L4 | Barbados | Sean Dehere, Terrence Haynes Cliff Gittens, Martyn Forde | 3:35.46 | |
| 26 | H1 L5 | Hong Kong | Shui Ki Szeto, Wing Fu Kin Lun Doo, Kwok Leung Chung | 3:35.82 | |
| 27 | H1 L7 | Nigeria | Afolabi Adeleke-Adedoyin, Musa Bakare Eric Williams, Gentle Offoin | 3:42.78 | |
| 28 | H1 L2 | Seychelles | Bertrand Bristol, Barnsley Albert Jean Paul Adam, Kenny Roberts | 3:46.76 | |
| 29 | H1 L3 | Macau | Wing Cheung Victor Wong, Kuan Fong Lao Chan Wai Ma, Chi Lon Lei | 3:48.65 | |
| - | - | Ivory Coast | | DNS | |