Around 200 local and foreign enterprises from Germany, China, South Korea and Singapore are taking part in the event.
The expo introduces the latest machinery, equipment, materials, vehicles, technology and services in the building industry.
Con Build Vietnam 2011 marks an important development for the infrastructure in the country and is a chance for domestic and international businesses to learn more about the construction market and trade promotion in Vietnam, said deputy Minister of Construction.
In addition, the fair also includes a display of lights and electric fittings.
The expo will run until December 12.