Alphabetically Union List - B
- B Trans Transport Chamical Workers Union
- Baby Sitter Workers Union
- Bag Industry Labour Union
- Bags and Packagaging Workers Union
- Baja Workers Union of Thailand
- Balarama Thailand Workers Union
- Banbrand Samphan Wokers Union
- Bangchak Petroleum Workers Union
- Bangkok Alloy Enterprise Cha Cherng Sao Workers Union
- Bangkok Alloy Enterprise Workers Union of Thailand
- Bangkok Bank Workers Union
- Bangkok China Paint Workers Union
- Bangkok Concrete Industry Workers Union
- Bangkok Dicasting Workers Union
- Bangkok Eagle Wing Workers Union
- Bangkok Flourmill Workers Union of Thailand
- Bangkok Glass Workers Union
- Bangkok Industrial Boiler Wokers Union
- Bangkok Inudstrial Gas Workers Union
- Bangkok Iron Workers Union of Thailand
- Bangkok Mass Transit Authority State
- Bangkok Paisal Textile Industrial Workers Union
- Bangkok Polysac Workers Union
- Bangkok Post Newspaper Labour Union
- Bangkok Post Supervisory Labour Union
- Bangkok Textile Factory Workers Union
- Bangkok Thai Urasia Workers Union
- Bangkok Top Workers Union
- Bangkok Union Workers Union
- Bangkokestern Coilcenter Workers Union
- Bangpa-in Paper Worerks Union
- Bangpra Golf Court Workers Union
- Bangyikhan Wisky 2 Laobur Union
- Bangyikhan Wisky Refinery Workers Union
- Bank For Agriculture and Agricultural a Cooperative state Enterprise Trade Union
- Banyan Thawee Spa Workers Union
- Banyan Tree Workers Union
- Benjarat Workers Union
- Bestext Workers Union
- Bigfair Workers Union
- BJKC Workers Union
- Bleash and Dye Industry Labour Union of Thailand
- BMW Auto Accessories (YMCA) Workers Union
- BMW MenuThailand Workers Union
- BNL Thailand Worker's Union
- Boat Canvas Garment Phuket Labour Union
- Bodin Footware Workers Union
- Body Parts Makers Workers Union
- Booncharoen Engineering Workers Union
- Boonrawd Brewery Workers Union
- BPB Thai Gipsum Workers Union
- BPK Workers Union
- Breezeway Navanakhon Workers Union
- Brings Property Transport Workers Union
- Buri Garment Thailand Workers Union
