This study aims to analyze the effect of profitability, asset growth, investment decisions on firm value with capital structure as a moderating variable. The population in this study is the company Jakarta Islamic Index for the period 2014-2018. The data were processed 90 data. The technique of studying data is purposive sampling. Data were analyzed using the Moderated Regression Analysis (MRA) method. The results of data analysis show that profitability has a positive effect on firm value. Asset growth, investment decisions and capital structure have no effect on firm value. Capital structur cannot strengthen the relationship between asset growth and investment decisions on firm value.