The men's 50 metre breaststroke event at the 2005 World Aquatics Championships took place between 26 July – 27 July. The heats and semifinals were held on 26 July. The final was held on 27 July.

Records

Prior to the competition, the existing world and championship records were as follows.

	Name	Nationality	Time	Location	Date
World record	Oleg Lisogor Oleg Lisogor Oleh Lisohor is a Ukrainian swimmer.Born in Brovary, Kiev Oblast, Soviet Union , Lisogor is the former world record holder in the 50 metres breaststroke, long course, with 27.18 seconds. The record was set in Berlin on 2 August 2002...	Ukraine Ukraine Ukraine is a country in Eastern Europe. It has an area of 603,628 km², making it the second largest contiguous country on the European continent, after Russia...	27.18	Berlin Berlin Berlin is the capital city of Germany and is one of the 16 states of Germany. With a population of 3.45 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union...	2 August 2002
Championship record	James Gibson James Gibson (swimmer) James Gibson MBE is an English swimmer.Born in Chelmsford, Essex, and raised in Witham, Gibson's specialism is breaststroke and he competes in the 50 metre, 100 metre and 200 metre events. In 2003 he became world champion at 50 metres . He was 6th in the 100 metre event at the Athens Olympics in...	Great Britain Great Britain Great Britain or Britain is an island situated to the northwest of Continental Europe. It is the ninth largest island in the world, and the largest European island, as well as the largest of the British Isles...	27.46	Barcelona Barcelona Barcelona is the second largest city in Spain after Madrid, and the capital of Catalonia, with a population of 1,621,537 within its administrative limits on a land area of...	22 July 2003

The following records were established during the competition:

Date	Round	Name	Nationality	Time	WR	CR
24 July	Semifinal	Roland Schoeman		23.01	WR	CR
25 July	Final	Roland Schoeman		22.96	WR	CR

Final

Rank	Name	Nationality	Time	Notes
	Roland Schoeman		22.06	WR
	Ian Crocker Ian Crocker Ian Lowell Crocker is a former American swimmer and five-time Olympic medalist. He is a former world record holder in the 100 meter butterfly ....		23.12
	Sergiy Breus Sergiy Breus Sergiy Breus is a butterfly swimmer from Ukraine, who won the gold medal in the men's 50 m butterfly at the 2004 European Long Course Championships in Madrid, Spain.-References:*...		23.38
4	Ryk Neethling Ryk Neethling Ryk Neethling is a South African swimmer. He won an Olympic gold medal in the 4×100 m freestyle relay at the 2004 Summer Olympics. He is the former joint owner of the 4×100 m freestyle relay world record and holds several South African records...		23.48
5	Fernando Scherer Fernando Scherer Fernando de Queiroz Scherer is an international top swimmer from Brazil, who won the bronze medal in the 50 meters freestyle at the 1996 Summer Olympics in Atlanta, Georgia...		23.74
6	Evgeny Korotyshkin Evgeny Korotyshkin Yevgeny Yevgeniyevich Korotyshkin, occasionally spelled "Evgeny", is a Russian swimmer from Moscow.- References :...		23.84
7	Duje Draganja Duje Draganja Duje Draganja |Split]]) is a swimmer from Croatia who won the silver medal in the men's 50 meter freestyle at the 2004 Summer Olympics in Athens, Greece....		23.96
8	Mike Mintenko Mike Mintenko Michael Mintenko is a freestyle and butterfly Olympic swimmer from Canada.-External links:* * -References:...		23.99