# Swimming at the 2007 World Aquatics Championships – Men's 50 metre backstroke

The men's 50 metre backstroke at the 2007 World Aquatics Championships took place on 31 March (prelims and semifinals ) and on the evening of 1 April (final) at Rod Laver Arena in Melbourne, Australia. 107 swimmers were entered in the event, of which 98 swam.
Existing records at the start of the event were:
* World record (WR): 24.80, Thomas Rupprath (Germany), 27 July 2003 in Barcelona, Spain.
* Championship record (CR): same

## Results
### Final

| Place | Lane | Name | Nationality | Time |
| | 3 | Gerhard Zandberg | South Africa | 24.98 |
| | 6 | Thomas Rupprath | Germany | 25.20 |
| | 4 | Liam Tancock | Great Britain | 25.23 |
| 4 | 5 | Steffen Driesen | Germany | 25.29 |
| 5 | 2 | Matthew Clay | Great Britain | 25.32 |
| 6 | 1 | Aristeidis Grigoriadis | Greece | 25.52 |
| 7 | 7 | Junya Koga | Japan | 25.56 |
| 8 | 8 | Matt Welsh | Australia | 25.61 |

### Semifinals

| Rank | Heat & Lane | Name | Nationality | Time | Notes |
| 1 | H2-L3 | Liam Tancock | Great Britain | 25.08 | Q |
| 2 | H2-L5 | Steffen Driesen | Germany | 25.21 | Q |
| 3 | H1-L4 | Gerhard Zandberg | South Africa | 25.26 | Q |
| 4 | H2-L4 | Thomas Rupprath | Germany | 25.29 | Q |
| 5 | H1-L5 | Matthew Clay | Great Britain | 25.48 | Q |
| 6 | H2-L6 | Junya Koga | Japan | 25.55 | Q |
| 7 | H1-L3 | Aristeidis Grigoriadis | Greece | 25.66 | Q |
| 8 | H1-L6 | Matt Welsh | Australia | 25.76 | Q |
| 8.5 | H1.5 | | | 25.79 | O |
| 9 | H2-L1 | Flori Lang | Switzerland | 25.81 | |
| 10 | H2-L2 | Tomomi Morita | Japan | 25.93 | |
| 11 | H1-L2 | Ľuboš Križko | Slovakia | 25.96 | |
| 12 | H2-L7 | Arkady Vyatchanin | Russia | 26.03 | |
| 13 | H2-L8 | David Ortega Pitarch | Spain | 26.26 | |
| 14 | H1-L8 | ZHANG Chang | China | 26.33 | |
| 15 | H1-L1 | Guy Barnea | Israel | 26.45 | |
| 999 | H1-L7 | Ouyang Kunpeng | China | DQ | |

### Heats

| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 12 | 3 | Thomas Rupprath | Germany | 25.25 | Q |
| 2 | 13 | 6 | Gerhard Zandberg | South Africa | 25.47 | Q |
| 3 | 13 | 5 | Steffen Driesen | Germany | 25.52 | Q |
| 4 | 13 | 4 | Matthew Clay | Great Britain | 25.66 | Q |
| 5 | 12 | 7 | Ryan Lochte | USA | 25.68 | Q (scratched semis) |
| 5 | 14 | 4 | Liam Tancock | Great Britain | 25.68 | Q |
| 7 | 12 | 4 | Aristeidis Grigoriadis | Greece | 25.74 | Q |
| 8 | 14 | 3 | Junya Koga | Japan | 25.88 | Q |
| 9 | 14 | 5 | Matt Welsh | Australia | 25.93 | Q |
| 10 | 14 | 8 | Aaron Peirsol | USA | 25.96 | Q (scratched semis) |
| 11 | 13 | 3 | Tomomi Morita | Japan | 25.98 | Q |
| 12 | 13 | 2 | Ľuboš Križko | Slovakia | 26.03 | Q |
| 13 | 14 | 6 | Arkady Vyatchanin | Russia | 26.14 | Q |
| 14 | 12 | 5 | OUYANG Kunpeng | China | 26.20 | Q |
| 15 | 12 | 2 | Flori Lang | Switzerland | 26.23 | Q |
| 16 | 13 | 8 | Guy Barnea | Israel | 26.24 | Q |
| 17 | 12 | 6 | David Ortega Pitarch | Spain | 26.26 | |
| 18 | 10 | 7 | Vytautas Janušaitis | Lithuania | 26.34 | (scratched semis) |
| 18 | 11 | 4 | ZHANG Chang | China | 26.34 | |
| 20 | 11 | 5 | Eduardo German Otero | Argentina | 26.37 | |
| 21 | 14 | 7 | Hayden Stoeckel | Australia | 26.38 | |
| 22 | 13 | 1 | Ivan Tolic | Croatia | 26.42 | |
| 22 | 14 | 1 | Andriy Oleynyk | Ukraine | 26.42 | |
| 24 | 11 | 7 | Garth Tune | South Africa | 26.49 | |
| 25 | 13 | 7 | Simon Dufour | France | 26.58 | |
| 26 | 10 | 1 | Itai Chammah | Israel | 26.67 | |
| 27 | 11 | 2 | Ioannis Kokkodis | Greece | 26.69 | |
| 28 | 12 | 8 | Derya Büyükuncu | Turkey | 26.71 | |
| 28 | 14 | 2 | Matthew Rose | Canada | 26.71 | |
| 30 | 10 | 5 | Pavel Sankovich | Belarus | 26.81 | |
| 31 | 10 | 3 | Kim Torry Simmenes | Norway | 26.89 | |
| 31 | 11 | 3 | Leonardo Guedes | Brazil | 26.89 | |
| 33 | 12 | 1 | Ante Cvitkovic | Croatia | 26.94 | |
| 34 | 11 | 8 | Danil Bugakov | Uzbekistan | 26.97 | |
| 35 | 10 | 6 | Stanislav Osinsky | Kazakhstan | 26.98 | |
| 36 | 11 | 6 | Gabriel Mangabeira | Brazil | 27.07 | |
| 37 | 11 | 1 | Mathias Stenderup Gydesen | Denmark | 27.37 | |
| 38 | 9 | 4 | Seunghyeon Lee | South Korea | 27.44 | |
| 39 | 9 | 7 | Yu An Lin | Chinese Taipei | 27.69 | |
| 40 | 9 | 6 | Giorgios Mylonas | Cyprus | 27.71 | |
| 41 | 1 | 5 | Romāns Miloslavskis | Latvia | 27.74 | |
| 42 | 9 | 3 | Geoffrey Robin Cheah | Hong Kong | 27.81 | |
| 43 | 10 | 8 | David Dunford | Kenya | 27.93 | |
| 44 | 9 | 5 | Rony Bakale | Congo | 27.96 | |
| 45 | 7 | 2 | Andy Wibowo | Indonesia | 27.97 | |
| 46 | 7 | 4 | Felix Cristiadi Sutanto | Indonesia | 27.98 | |
| 47 | 7 | 3 | Miguel Robles | Mexico | 28.00 | |
| 48 | 8 | 5 | Suriya Suksuphak | Thailand | 28.05 | |
| 49 | 8 | 4 | Jared Heine | Marshall Islands | 28.24 | |
| 50 | 9 | 1 | Taki Mrabet | Tunisia | 28.41 | |
| 51 | 8 | 2 | Sandeep Nagar Anthal | India | 28.50 | |
| 52 | 9 | 8 | Arjun Muralidharan | India | 28.62 | |
| 53 | 2 | 1 | Roy-Allan Saul Burch Burch | Bermuda | 28.67 | |
| 54 | 7 | 7 | Zhi Cong Lim | Singapore | 28.75 | |
| 54 | 8 | 7 | Shahin Baradaran Nakhjavani | Iran | 28.75 | |
| 54 | 9 | 2 | Amine Kouam | Morocco | 28.75 | |
| 57 | 6 | 2 | Jorge Arturo Arce Aita | Costa Rica | 28.81 | |
| 58 | 8 | 3 | Iurii Zakharov | Kyrgyzstan | 28.85 | |
| 59 | 7 | 8 | Mario Montoya | Costa Rica | 28.89 | |
| 60 | 6 | 4 | Wen Hao Joshua Lim | Singapore | 28.95 | |
| 61 | 7 | 5 | Gael Adam | Mauritius | 29.13 | |
| 62 | 7 | 6 | Yassir Abalalla | Bolivia | 29.16 | |
| 63 | 8 | 6 | Obaid Al-Jasmi | United Arab Emirates | 29.19 | |
| 63 | 8 | 1 | Onan Thom | Guyana | 29.19 | |
| 65 | 6 | 8 | Adonis Ganiev | Uzbekistan | 29.22 | |
| 66 | 2 | 8 | Eric Chang | Malaysia | 29.28 | |
| 67 | 5 | 7 | Khaly Ciss | Senegal | 29.36 | |
| 68 | 6 | 5 | Heshan Unamboowe | Sri Lanka | 29.40 | |
| 69 | 5 | 6 | Sohaib Kalali | Syria | 29.49 | |
| 70 | 5 | 8 | Rainui Terupaia | Tahiti | 29.50 | |
| 71 | 6 | 1 | Jonathan Calderon | Saint Lucia | 29.70 | |
| 72 | 5 | 5 | Hong Nam Lei | Macau | 29.72 | |
| 73 | 6 | 3 | Erik Rajohnson | Madagascar | 29.92 | |
| 74 | 6 | 7 | Tural Abbasov | Azerbaijan | 30.47 | |
| 75 | 5 | 2 | Kin Wa Cheong | Macau | 30.70 | |
| 76 | 5 | 3 | Jamie Zammitt | Gibraltar | 30.72 | |
| 77 | 4 | 6 | Fadi Awesat | Palestine | 30.84 | |
| 78 | 4 | 4 | Kerson Hadley | Federated States of Micronesia | 30.89 | |
| 79 | 3 | 4 | Tony Augustine | Federated States of Micronesia | 30.91 | |
| 80 | 4 | 5 | Zane Jordan | Zambia | 31.21 | |
| 81 | 4 | 8 | Hernan Bonsembiante | Guam | 31.42 | |
| 82 | 5 | 1 | Richard Randrianandraina | Madagascar | 31.60 | |
| 83 | 4 | 3 | Jamaal Sobers | Guyana | 32.08 | |
| 84 | 3 | 7 | Justin Decoster | Marshall Islands | 32.94 | |
| 85 | 4 | 2 | Sami Nassar | Palestine | 33.46 | |
| 86 | 3 | 1 | Isao Misech | Palau | 33.54 | |
| 87 | 3 | 5 | Monder Al−Jabali | Libya | 33.82 | |
| 88 | 3 | 2 | Rahim Karmali | Uganda | 34.28 | |
| 89 | 3 | 8 | Ali Zayeri | Brunei | 34.82 | |
| 90 | 2 | 4 | Ibrahim Shameel | Maldives | 36.34 | |
| 91 | 2 | 6 | Bulguitei Buyankhishig | Mongolia | 36.65 | |
| 92 | 1 | 3 | Herve Nkurrnziza | Burundi | 36.86 | |
| 93 | 4 | 7 | Kevin Cheung | Mauritius | 36.96 | |
| 94 | 2 | 2 | Ching Maou Wei | American Samoa | 38.65 | |
| 95 | 2 | 5 | Mohammed Al Qerbi | Yemen | 38.75 | |
| 96 | 1 | 4 | Boipelo Makhothi | Lesotho | 40.72 | NR |
| 97 | 2 | 7 | Thabiso Baholo | Lesotho | 43.67 | |
| 999 | 2 | 3 | Jules Yao Bessan | Benin | DQ | |
| 998 | 3 | 3 | Carlos Shimizu | Guam | DNS | |
| 998 | 3 | 6 | Ashraf Ahmed | Sudan | DNS | |
| 998 | 4 | 1 | Marbi Hani | Albania | DNS | |
| 998 | 5 | 4 | João Aguiar | Angola | DNS | |
| 998 | 6 | 6 | Samson Opuakpo | Nigeria | DNS | |
| 998 | 7 | 1 | Mohammad Rubel | Bangladesh | DNS | |
| 998 | 8 | 8 | Essossimana Awizoba | Togo | DNS | |
| 998 | 10 | 2 | Jason Dunford | Kenya | DNS | |
| 998 | 10 | 4 | Markus Rogan | Austria | DNS | |