The Manila-based bank's report covering 45 countries says despite dramatic growth in infrastructure development that has spurred an economic rise, reduced poverty and improved people's lives, a substantial infrastructure gap remains.
It said more than 400 million people still lack electricity, 300 million have no access to safe drinking water and about 1.5 billion lack basic sanitation.
"The demand for infrastructure across Asia and the Pacific far outstrips current supply," said ADB President Takehiko Nakao. "Asia needs new and upgraded infrastructure that will set the standard for quality, encourage economic growth, and respond to the pressing global challenge that is climate change."
The report said that the 25 economies comprising 96 percent of the region's population currently spend USD 881 billion a year on infrastructure.
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