The victims are Azad, 50, and his wife Jesmin, 40.
DMCH outpost Sub-Inspector Bachchu Mia said confirmed about the deaths to the Dhaka Tribune on Thursday afternoon.
He said: “Jesmin died in the early hours of Thursday while Azad died around 11:30am.”
Their 10-year-old son Roni, who sustained 40% burn injuries in the incident, died on October 28.
The fire was caused by a gas leakage in the family’s home in Jurain’s Postogola area on October 22.
They were rushed to the DMCH National Institute of Burn and Plastic Surgery around 9am.
Doctors said the couple’s niece Sharmin, 25, sustained 38% burns.