The 2004 Taiwanese legislative election was held on 11 December 2004. All 225 seats of the Legislative Yuan were up for election: 168 elected by single non-transferable vote, 41 elected through party-list Proportional representation, eight elected from overseas Chinese constituencies on the basis of the proportion of nationwide votes received by participating political parties, eight elected by popular vote among the aboriginal populations. Members served three-year terms beginning on 1 February 2005, and ending 31 January 2008. The next term served four years.

The Legislative Yuan is the unicameral legislature of the Republic of China (Taiwan) located in Taipei. The Legislative Yuan is composed of 113 members, who are directly elected for four-year terms by people of the Taiwan Area through a parallel voting system.