(Main article: Swimming at the 2007 World Aquatics Championships) The men's 200 metre butterfly at the 2007 World Aquatics Championships took place on 27 March (heats and semifinals) and on the evening of 28 March (final) at Rod Laver Arena in Melbourne, Australia. 64 swimmers were entered in the event, of which 62 swam. Existing records at the start of the event were: * World record (WR): 1:53.71, Michael Phelps (USA), 17 February 2007 in Columbia, United States. * Championship record (CR): 1:53.98, Michael Phelps (USA), Barcelona, Spain (22 July 2003)