The Full Form of IIBI is‍ Industrial Investment Bank of India.

Industrial Development Bank of India (IDBI Bank Limited or IDBI Bank or IDBI) was established in 1964 by an Act to provide credit and other financial facilities for the development of the fledgling Indian industry. Many national institutes finds their roots in IDBI like SIDBI, India Exim Bank, National Stock Exchange of India and National Securities Depository Limited.

Initially it operated as a subsidiary of the Reserve Bank of India and later RBI transferred it to the Government of India. On 29 June 2018, Life Insurance Corporation of India (LIC) has got a technical go-ahead from Insurance Regulatory and Development Authority of India (IRDAI) to increase stake in IDBI Bank up to 51%. LIC completed acquisition of 51% controlling stake on 21 January 2019 making it the majority shareholder of the IDBI Bank. Reserve Bank of India has clarified vide a Press Release dated 14 March 2019, that IDBI Bank stands re-categorized as a Private Sector Bank for regulatory purposes with effect from 21 January 2019.

The bank has an aggregate balance sheet size of ₹3.74 trillion as on 31 March 2016. It has 3,683 ATMs, 1,892 branches, including one overseas branch in Dubai, 58 e-lounges and 1,407 centers as of 1 February 2020