Branch trade unions unite smaller units (regional/local trade union associations throughout Belarus, trade unions) by their relevance to a certain branch of industry and represent their interests at the republican level.

The Federation of Trade Unions of Belarus currently affiliates 28 republican branch trade unions:

Belarusian Trade Union of Workers of National Academy of Sciences of Belarus
Belarusian Trade Union of Workers of Healthcare Workers
Belarusian Trade Union of Workers of Automobile Transport and Road Management
Belarusian Trade Union of Workers of Automobile and Agricultural Machine Building
Belarusian Trade Union of Workers of Bank and Financial Institutions
Belarusian Trade Union of Workers of Railroad and Transport Construction Belarusian Trade Union of Workers of Commerce
Belarusian Trade Union of Workers of Chemical, Mining and Oil Industries
Belarusian Trade Union of Forestry Workers
Belarusian Trade Union of Aviation Workers
Belarusian Trade Union of Workers of Light Industry
Belarusian Trade Union of Metalworkers
Belarusian Trade Union of Workers of Cooperative Societies, Small Businesses and Other Forms of Entrepreneurship of Belarus "Sadruzhnast"
Belarusian Trade Union of Workers of Military Forces, Border Guard Forces and Ministry of Emergency Situations
Belarusian Trade Union of Workers of State and Other Institutions
Belarusian Trade Union of Workers of Communications
Belarusian Trade Union of Workers of Tax and Other Financial Authorities “Edinstvo”
Belarusian Trade Union of Workers of Oil and Gas Industries
Belarusian Trade Union of Workers of Agricultural and Industrial Complex
Belarusian Trade Union of Workers of National Security Authorities
Belarusian Trade Union of Workers of Arts
Belarusian Trade Union of Workers of Local Industry and Communal Domestic Enterprises
Belarusian Trade Union of Workers of Nature Management and Geotechnologies Branches
Belarusian Trade Union of Workers of Industry
Belarusian Trade Union of Workers of Education and Sciences
Belarusian Trade Union of Workers of Power Supply, Electrotechnical and Fuel Industries
Belarusian Trade Union of Workers of Construction and Construction Materials' Industry
Belarusian Trade Union of Workers of Consumer Cooperation