Social Democratic Left Party of Sweden (Swedish: Sverges Socialdemokratiska Vänsterparti, SSV) was a political party formed in 1921, after a split from the main SSV.
When the original SSV approved the 21 thesis of the Communist International and thus changing name to SKP (Communist Party of Sweden) in 1921, an anti-ComIntern minority were expelled and founded their own "SSV". This "SSV" existed between 1921 and 1923. The leader of this party was Ivar Vennerström. "SSV" participated in two elections, the parliamentary elections of 1921 and the municipal election in 1922. In 1923 they merged with the social democrats.
Västerbottens Folkblad, a newspaper published in Umeå, was then a publication of this tendency. Today, it is a social democratic magazine.