In this study, an attempt is made to investigate the relation between financial liberalization policy, legal institutions and development of financial sector for the case of 10 developing countries, over the period 1973-2009. However based on the results, certain policy recommendations regarding the implementation of financial reforms for the Iranian economy have been presented in toto.The empirical results of this paper, indicate prima facie, that the financial liberalization policy bear positive impact on financial development of those 10 countries under the review. Thus, the domestic financial sector liberalization policies such as reducing interest rates and credit controls, reducing barriers to entry in to the banking sector and increasing competition in the financial sector Viz-a-Viz raising the opportunity for private sector to augment its share of ownership in the banking sector, limiting the constraints on international capital flow, and mitigating the use of multiple exchange rate system for conversion of capital transactions all could impose positive effect on development of financial sector in these countries. Though the efficacy of above mentioned policies in the sample countries could be intensified, if and only if, they avail the privilege of sound and solid framework of legal and regulatory institutions de Jure.However, we conclude that before implementing these policies, all countries under the study, need per se, to reform their legal institutions as a precondition for successful execution of financial liberalization policies.