The Party of the Democratic Left (Slovak: Strana demokratickej ľavice, SDĽ) was a social-democratic political party in Slovakia from 1990 to 2004.

Congress reconfirmed Peter Weiss as party chairman.

From 1994 to 1997, SDĽ was a member of a coalition called "Common Choice" (Spoločná voľba) that gained 10.18% (18 seats) in the Slovak parliament.

[1] On 4 December 2004, the party membership voted to merge with Direction – Social Democracy from 1 January 2005.

The latter party had broken off from the SDL five years earlier.