The Finnish Confederation of Professionals (STTK) (Finnish: Toimihenkilökeskusjärjestö, Swedish: Tjänstemannacentralorganisationen) is a trade union confederation in Finland.

It has a membership of 650,000 and represents salaried employees in Finland.

The STTK was founded in 1946, to represent STTK's counterparts are the Central Organisation of Finnish Trade Unions (SAK) and the Confederation of Unions for Academic Professionals in Finland (AKAVA).

The STTK got its current form in 1993 when most of the unions affiliated with the bankrupt Confederation of Salaried Employees joined the original STTK, founded in 1946.

Affiliates in March 2020 were:[1]