It is considered the biggest ever human trafficking case in the Pacific.
The man behind a business called Mr Price, Sekdah Somon, was sentenced to 14 years in jail and fined, while his wife, Buxoo Nabilah Bibi got 7 years' jail and a further fine.
Two others, Anowar Hossain and Palas Hosan, got 6 and 7 years in jail respectively.
This quartet had masterminded an arrangement to lure more than 100 Bangladeshis into Vanuatu with the promise of employment, but they ended up being enslaved.