The main objective of this research is to investigate the impact of institutional quality on the underpricing of IPOs in Hong Kong. Besides, ordinary least squares presented in the study used quantile regression as a robust technique to investigate the association of institutional quality and the underpricing level of 986 IPO from January 2000 to December 2017 in the Hong Kong stock market. Through research findings, it is asserted that voice and accountability, regulatory quality, control of corruption and firm size are significantly negatively correlated. Whereas, government effectiveness and rule of law are significantly positively correlated in influencing the underpricing of IPO in Hong Kong. Findings are consistent with the quantile regression analysis. The research is beneficial to the main participants of the market, such as investors, issuers and regulators.