This study exsamines the performance of global islamic indices between islamic and conventional indices during the period of 1st January 1999 to 31st October 2011. There are 12 global islamic and conventional indices selected which cover eight countries such as United States, United Kingdom, Malaysia, Indonesia,Hong Kong, Switzerland, Indian and France. The risk adjusted performance measurement is employs to estimate both islamic and conventional indices. The correlation coefficient and t-test is used to test the relationship and mean returns between both islamic and conventional indices. The results shows that islamic indices are outperformed and better compare to conventional indices