Islamic banking has the characteristics of an operation that uses a profit-sharing system and its main goal is to achieve Falah. This also affects the performance measurement of sharia banking which also adapts to these two characteristics. One method of measuring the performance of Islamic banking is to use the Maqashid-Based Performance Evaluation Model (MPEM) method. This study aims to prove the effect of good corporate governance variables (board of commissioners, independent commissioners, sharia supervisory board, and audit committee) on the performance of Islamic banking based on the MPEM method. This study uses secondary data obtained from 20 Islamic banks in 4 Southeast Asia countries from 2016 to 2020 observation years. The method used for data analysis is using a panel regression model with the random effect as the chosen model. This study found that the board of commissioners and the audit committee has a negative effect on the performance of Islamic banking in Southeast Asia based on maqashid syariah. The ratio of the independent commissioners and the sharia supervisory board does not affect the performance of Islamic banking in Southeast Asia based on Maqasid Syariah. This study also found a result that the average maqashid performance index of sharia banking in Southeast Asia is only around 12.7%.
 Keywords: Good Corporate Governance, Maqashid Syariah, Performance, Sharia Banks