Party of the Democratic Left

A social democratic political party active in the Czech and Slovak Federative Republic and Slovakia from 1990 to 2004. From November 4, 1990, to April 7, 1992, it operated as part of the Communist Party of Czechoslovakia federation, and subsequently as an independent political party until 2004.

The was formed in 1990 through the transformation of the former Communist Party of Slovakia (KSS) by a group of its reform-oriented members. It ceased to exist on 31 December 2004, following the party's fragmentation into multiple entities and its failure in the 2002 parliamentary elections, by merging with the Smer party.

Chairperson: Peter Weiss (1991 – 1996), Jozef Migaš (1996 – 2001), Pavel Koncoš (2001 – 2002), Ľubomír Petrák (2002 – 2004)