The arrest of Piyaporn Saesanthia, 28, and her husband, Thossapol Boonmanut, 29, was announced at CSD headquarters.
Police said the two had been arrested under a warrant issued by Min Buri Court on September 26 last year.
They were apprehended in Bangkok’s Bang Bon district on Monday.
The victims filed complaints with the CSD that the couple had used their Facebook accounts to deceive them into investing in a fund with promised returns of 20 to 50 per cent per week.
The victims also claimed that they had been deceived into inviting friends to join the fund.
The alleged deception took place in 2016 and 2017, police said.