The Socialist Youth League (Socialistiska Ungdomsförbundet) was the youth organization of the SwedishSocialist Party. The organization was formed in 1929. Initially it was known as the Communist Youth League (Kommunistiska Ungdomsförbundet). KUF changed name to SU in 1934.
Along with its mother party, the youth league gradually developed a pro-Nazi position. It disappeared along with its mother party at the end of the Second World War.