Newly-elected lawmaker from Tangail-8 constituency Anupam Shahjahan Joy took oath of office yesterday.
Speaker Dr Shirin Sharmin Chaudhury administered the oath at the Jatiya Sangsad Bhaban.
Anupam was elected MP in the by-polls held on March 29.
The parliamentary seat (Basail-Sakhipur) fell vacant following the death of AL MP Shawkat Momen Shahjahan, also Anupam's father, on January 20.