Chronological order Union List (based on registered year) - 1975
- Thai Amarit Brewery Workers Union
- Sermsuk Labour Union
- Lion and Affiliates Workers Union of Thailand
- Stationary Enterprise Workers Union
- Honda Labour Union of Thailand
- Thai Oil Refinery Workers Union
- New Kwang Soon Lee Labour Union
- Nakhonratchasima Garment Workers Union
- Siam Fiber Textile Labour Union
- Tin Mine December 12 Labour Union
- Tin Mine Workers Union of Thailand
- Siam Cement Construction Materials Workes Union
- Thailand Tyre Labour Union
- Metal Box Thailand Workers Union
- Pipat Samphan Workers Union
- Fishing Instruments Thaiald Workers Union
- Kumpawapi Sugar Workers Union
- Udorn Thani Workers Union
