This study aims to analyze the effect of capital structure, sales growth, profitability and firm size on firm value. This type of research is quantitative with a population of mining sector companies listed in the Indonesia Stock Exchange in 2016 - 2018. The sampling method used was purposive sampling and obtained as many as 39 mining sector companies with 117 observational data. The analysis technique used is multiple linear regression. The results showed that the variable capital structure has a profitability has a positive effect on firm value, sales growth has a negative effect on firm value, while firm size has not effect on firm value. This research has implications that mining companies with capital structure and profitability can increase company value. While mining companies with high sales growth and firm size does not guarantee increased company value. This research is expected to provide benefits to mining companies in order to increase the value of their company by looking at the factors that influence it.