This research study has given important implications for regulators through elaborating the association between economic growth, financial openness among the five member countries of ASEAN including Philippines, Indonesia, Thailand, Malaysia, and Singapore. An insight has been provided about the relation of economic growth and trade openness from the practical aspect in ASEAN economies. Therefore, the policy makers are supported through this information to develop, overview, and revise the existing regulations and policies of financial openness. This research study has made significant contributions through analyzing the association between economic growth and financial openness from the theoretical aspect. The study has argued that the current literature is extended by this study through focusing on the developing economies of ASEAN. Banking sector is a crucial institution for any economy and economic growth is negatively influenced through collapse of the banking activities. Further, financial system comes at risk through financial openness, but it has a considerable role in the development of economies. The financial system liberalization is the main factor, which drives economic growth among the ASEAN countries. There is need for the policy makers to review and alter the existing regulations of financial openness.