In 2016, total investment in these four sectors — from public and private sources and international institutions — was $62.5 billion (52.82 billion euros), compared with $78.9 billion in 2015, it said.
“A spending requirement of around $120bn-$140bn (at 2015 dollar rates) (is needed) in the short-term,” said the report, entitled Infrastructure Financing in Africa 2016.
Chinese investment fell sharply last year, to $6.4 billion from $20.9 billion in 2015, a year that was exceptional.
Averaged out over the five years from 2011-16, China invested $12 billion annually, making it the biggest single investor in African infrastructure.
African states invested $26.3 billion in 2016 after $24 billion in 2015.
Transport accounted for 39.2 percent of infrastructure investment in 2016, followed by energy (31.9 percent), water and sanitation (16.9 percent) and information technology/communications (2.6 percent).
The ICA was launched at the 2005 G8 summit in Gleneagles, Scotland with the aim of spurring infrastructure investment in Africa from all sources.
Its members include G8 nations, South Africa, the World Bank, the European Commission and European Investment Bank (EIB), the African Development Bank (AfDB) group and the Development Bank of Southern Africa (DBSA).