Social Liberal group was formed on 8 May 2004 and ended 10 May 2005, from the formal Centrists who left to form the Centre Party. The social-liberals had only a group status, not even a fraction or a party status.

Social-liberals had three seats in Parliament. In Riigikogu

Riigikogu

The Riigikogu is the unicameral parliament of Estonia. All important state-related questions pass through the Riigikogu...

 they had a vice chairman chair, Peeter Kreitzberg

Peeter Kreitzberg

Peeter Kreitzberg was an Estonian politician, member of parliament and a member of the Social Democratic Party. Kreitzberg served as the Estonian Minister of Education and Research from April to November 1995...

. The group members had a different ideology, so it was likely that the group would split up to other parties. On 31 March they made an agreement with Estonian Socialdemocratic Party

Social Democratic Party (Estonia)

The Social Democratic Party is a social-democratic party in Estonia, led by Sven Mikser. It has been a member of the Party of European Socialists since 16 May 2003 and a member of the Socialist International since November 1990....

. This agreement declared their co-operation in parliament and in local council election in 2005.

On 4 April 2005, Olev Laanjärv returned to the Centre Faction. On 10 May 2005 Peeter Kreitzberg and Sven Mikser joined with ESDP, Robert Lepikson joined with People's Union and Harri Õunapuu joined with Reform Party. On 22 November 2005 Jaanus Marrandi joined with People's Union. On 27 November 2005, Mark Soosaar joined with ESDP.

Members of Parliament (independents after 22 November)

• Liina Tõnisson