This study aims to determine the effect of Diversification, Intellectual Capital and Business Risk on Firm Value. This research is a causal study with a quantitative descriptive approach with the object of research on companies - companies included in LQ 45 that are on the Indonesia Stock Exchange in Jakarta. The research data is secondary data obtained from looking at the financial statements of existing companies included in LQ 45. The variables of this study consist of independent variables consisting of three variables namely Diversification, Intellectual Capital and Business Risk. And one dependent variable is Corporate Value. The results of this study indicate that Business Diversification and Risk has an effect on company value. While Intellectual Capiral has no effect.