The Institute of Architects Bangladesh (IAB) (Bengali: বাংলাদেশ স্থপতি ইন্‌স্‌টিটিউট, Bānglādēsh Sthāpāti Institute) is a professional organization for architects in Bangladesh.

The organization works with different government organizations to offer educational services and advocates to improve the quality of the architecture profession in Bangladesh.

New houses and buildings to be built in Bangladesh must be designed by member architects of this organization.

The Institute of Architects Bangladesh (IAB) was founded in Dhaka on 25 February 1972.

There are three levels of membership in the IAB depending on professional experience.