Since 1990s South-South investment flows have assumed a considerable significance in the economic relations among developing countries. The host developing countries tend to see the growing FDI flows from co-developing economies as a prospective source of financial capital, skills and technologies useful for their economic development. However, there is clearly a lack of recognition among them about the potential of southern investment in improving their civil, social and industrial infrastructure. A distinction can be made between the two main forms in which developing country firms participate in the infrastructure sector of co-developing countries. The first is the project exports resorted by southern firms in various infrastructure areas like transportation, communication, energy, etc. The second form comprises direct investment operation of southern firms to provide infrastructure services to the end users. India presents a classic example of South-South investment in infrastructure sector with Indian firms consistently expanding their project exports and infrastructure-related FDI activities over the years. In the light of growing size of Indian project exports and infrastructure FDI, this study calls for evolving a holistic policy framework by both home and host developing countries to enhance the potential of such investment for infrastructure development.