# Swimming at the 2005 World Aquatics Championships – Men's 50 metre backstroke

The Men's 50 Backstroke event at the 11th FINA World Aquatics Championships swam on 30 – 31 July 2005 in Montreal, Canada. Preliminary and Semifinal heats swam on 30 July; the Final was 31 July.
Prior to the start of the event, the existing World (WR) and Championship (CR) records were both:

## Results
### Final

| Place | Swimmer | Nation | Time |
| 1 | Aristeidis Grigoriadis | Greece | 24.95 |
| 2 | Matt Welsh | Australia | 24.99 |
| 3 | Liam Tancock | Great Britain | 25.02 |
| 4 | Randall Bal | USA | 25.23 |
| 5 | Aaron Peirsol | USA | 25.30 |
| 6 | Thomas Rupprath | Germany | 25.38 |
| 7 | Junichi Miyashita | Japan | 25.85 |
| 8 | Marco Di Carli | Germany | 26.48 |

### Semifinals

| Rank | Swimmer | Nation | Time | Note |
| 1 | Aristeidis Grigoriadis | Greece | 25.11 | Q |
| 2 | Liam Tancock | Great Britain | 25.22 | Q |
| 3 | Matt Welsh | Australia | 25.36 | Q |
| 4 | Thomas Rupprath | Germany | 25.52 | Q |
| 5 | Aaron Peirsol | USA | 25.55 | Q |
| 6 | Junichi Miyashita | Japan | 25.58 | Q |
| 7 | Randall Bal | USA | 25.60 | Q |
| 8 | Marco di Carli | Germany | 25.69 | Q |
| 9 | David Ortega | Spain | 25.73 | |
| 10 | Alex Lim | Malaysia | 25.78 | |
| 11 | Flori Lang | Switzerland | 25.84 | |
| 12 | Tomomi Morita | Japan | 25.86 | |
| 13 | Ľuboš Križko | Slovakia | 26.04 | |
| 14 | Scott Talbot | New Zealand | 26.23 | |
| 15 | Pavlo Illichov | Ukraine | 26.30 | |
| 16 | Gabriel Mangabeira | Brazil | 26.78 | |

### Preliminaries

| Rank | Heat/Lane | Swimmer | Nation | Time | Notes |
| 1 | H9 L5 | Thomas Rupprath | Germany | 25.44 | q |
| 2 | H7 L4 | Liam Tancock | Great Britain | 25.46 | q |
| 3 | H8 L6 | Randall Bal | United States | 25.54 | q |
| 4 | H9 L4 | Aristeidis Grigoriadis | Greece | 25.59 | q |
| 5 | H8 L4 | Matt Welsh | Australia | 25.64 | q |
| 6 | H9 L6 | David Ortega | Spain | 25.71 | q |
| 7 | H7 L6 | Aaron Peirsol | United States | 25.77 | q |
| 8 | H8 L3 | Alex Lim | Malaysia | 25.79 | q |
| 9 | H7 L3 | Junichi Miyashita | Japan | 25.80 | q |
| 10 | H9 L3 | Flori Lang | Switzerland | 25.98 | q |
| 11 | H7 L5 | Tomomi Morita | Japan | 26.02 | q |
| 12 | H8 L5 | Marco di Carli | Germany | 26.09 | q |
| 13 | H7 L2 | Ľuboš Križko | Slovakia | 26.27 | q |
| 14 | H8 L7 | Scott Talbot | New Zealand | 26.30 | q |
| 15 | H8 L2 | Pavlo Illichov | Ukraine | 26.39 | q |
| 16 | H9 L8 | Gabriel Mangabeira | Brazil | 26.47 | q |
| 17 | H9 L2 | Gordan Kožulj | Croatia | 26.49 | |
| 18 | H8 L8 | Pavel Suskov | Lithuania | 26.51 | |
| 19 | H7 L1 | Andrew Lauterstein | Australia | 26.52 | |
| 19 | H9 L1 | Örn Arnarson | Iceland | 7 26.52 | |
| 21 | H8 L1 | Markus Rogan | Austria | 26.55 | |
| 21 | H9 L7 | Pierre Roger | France | 26.55 | |
| 23 | H7 L7 | Tomasz Rumianowski | Poland | 26.80 | |
| 24 | H4 L6 | Yoav Gath | Israel | 27.20 | |
| 25 | H6 L6 | Nick Neckles | Barbados | 27.37 | |
| 26 | H6 L2 | Jernej Godec | Slovenia | 27.45 | |
| 27 | H6 L7 | Garth Tune | South Africa | 27.63 | |
| 28 | H6 L5 | Seung-Hyeon Lee | South Korea | 27.74 | |
| 29 | H6 L1 | Andy Wibowo | Indonesia | 28.01 | |
| 30 | H5 L4 | Jason Dunford | Kenya | 28.02 | |
| 31 | H5 L8 | Kieran Locke | Virgin Islands | 28.07 | |
| 32 | H6 L8 | Shawn Clarke | Barbados | 28.10 | |
| 33 | H4 L8 | Jared Heine | Marshall Islands | 28.21 | |
| 34 | H5 L3 | Onan Orlando Thom | Guyana | 28.22 | |
| 34 | H5 L6 | Zhi Cong Lim | Singapore | 28.22 | |
| 36 | H5 L2 | Alessio Domenack | Peru | 28.24 | |
| 37 | H6 L4 | Oleg Pukhnatiy | Uzbekistan | 28.50 | |
| 38 | H4 L5 | David Dunford | Kenya | 28.52 | |
| 39 | H4 L4 | Chi Lon Lei | Macau | 28.55 | |
| 39 | H7 L8 | Mansoor Al-Mansoor | Kuwait | 28.55 | |
| 41 | H5 L7 | Gael Adam | Mauritius | 28.74 | |
| 42 | H6 L3 | Francois Ghattas | Lebanon | 28.77 | |
| 43 | H3 L3 | Yassir Abdalla | Bolivia | 28.91 | |
| 44 | H5 L1 | Daniel Carrillo | Paraguay | 29.07 | |
| 45 | H4 L3 | Michael O'Connor | Bermuda | 29.16 | |
| 46 | H5 L5 | LIN Yu−An | Chinese Taipei | 29.24 | |
| 47 | H3 L4 | Francisco Montenegro | Guatemala | 29.31 | |
| 48 | H3 L7 | Khaly Ciss | Senegal | 29.33 | |
| 49 | H4 L1 | Gordon Touw Ngie Tjouw | Suriname | 29.34 | |
| 50 | H3 L6 | Romulo Pereira | Angola | 29.92 | |
| 50 | H3 L2 | Erik Rajohnson | Madagascar | 29.92 | |
| 52 | H3 L1 | Horacio Carcamo | Honduras | 30.45 | |
| 53 | H2 L5 | Imdad Ali | Pakistan | 30.59 | |
| 54 | H2 L2 | Diego Foianini | Bolivia | 30.62 | |
| 55 | H2 L1 | Alain Brigion-Tobe | Cameroon | 30.63 | |
| 56 | H3 L5 | Antonio Tong | Macau | 30.70 | |
| 57 | H3 L8 | Reginaldo Panting | Honduras | 30.82 | |
| 58 | H2 L3 | Tunui Cowan | Tahiti | 31.03 | |
| 59 | H2 L4 | Fernando Medrano | Nicaragua | 31.38 | |
| 60 | H2 L7 | Jonathan Calderon | Saint Lucia | 31.48 | |
| 61 | H1 L6 | Ganbold Urnultsaikhan | Mongolia | 31.67 | |
| 62 | H2 L8 | Connor Keith | Guam | 32.24 | |
| 63 | H1 L5 | Gilbert Kaburu | Uganda | 33.79 | |
| - | H1 L3 | Kodjovi Mawuena Kowouvi | Togo | DNS | |
| - | H1 L4 | Gibrilla Bamba | Sierra Leone | DNS | |
| - | H2 L6 | Andrey Molchanov | Turkmenistan | DNS | |
| - | H4 L2 | Shahin Baradaran | Iran | DNS | |
| - | H4 L7 | Leonel Matonse | Mozambique | DNS | |