Income diversification strategy is one of the useful tools of risk management technique. Banks have identified different sources of income apart from their traditional source of income. Capital market is one of such source of income identified by the banks today. Every year banks invest a large volume of fund in capital market. In this study it is attempted to observe the impact of income diversification on the capital market investment decision of the public sector banks in India. For this purpose data are collected from 12 public sector banks for 5 years period from 2017 to 2021. Variants of panel data regression analysis are applied in this study. The result revealed that there is a significant impact of income diversification on the capital market investment of Indian public sector banks.