Syndikalistiska Arbetarefederationen ('Syndicalist Workers Federation', SAF) was a syndicalist trade union centre in Sweden 1928-1938. SAF was founded in 1928, as a splinter group from Sveriges Arbetares Centralorganisation (SAC). SAF published the weekly newspaper Arbetare-kuriren from Göteborg. SAF criticised SAC of centralism and bureaucracy. SAF consistently tried to keep its membership dues low, in order to attract low-paid workers.
In 1928 SAF had around 1,000 members. By the mid-1930s, the number had grown to around 3,000.
SAC took several initiatives towards a reunification with SAF. In 1938, SAF merged into SAC.