Australia, Britain, France, Germany, Italy and Russia have all said they intend to join the bank, despite scepticism about the AIIB in Washington and Tokyo.
China and 20 other countries signed a memorandum of understanding last October to establish the Beijing-headquartered USD 50 billion AIIB.
"Egypt has applied to join the Asian Infrastructure Investment Bank," foreign ministry spokesman Badr Abdel Atti told AFP.
The new multinational lender is seen as a threat to the World Bank and the Asian Development Bank, two institutions under strong US influence.
China is expected to foot the bulk of the initial money needed to get the AIIB started, with donations from other members set to increase the size of the overall fund to more than USD 100 billion.