Delwar Hossain and his wife Mahmuda Akter were charged with homicide in December last year for a fire in the factory in November 2012. They are among 13 people charged over the fire.
The couple arrived at Dhaka magistrates court, and have now been jailed after their plea for bail was rejected. Although arrests warrants had been issued in December, they had been living freely in Dhaka.
According to the BBC, the Tazreen fire was Bangladesh's deadliest garment factory fire, bringing global attention to working conditions in the all-important garment industry. Investigators found that the nine-storey factory had no emergency exits, and workers desperately trying to leave found that some of the gates were locked from the outside when the fire broke out, the report added.