This study aims to determine the effect of firm size and liquidity on capital structure partially and simultaneously. This research was conducted because there were inconsistencies in the results of previous studies. The data used is secondary data using a sample of 67 samples of Non-Financial Blue Chip companies listed on the Indonesia Stock Exchange in 2017-2020. Sampling was carried out using purposive sampling. This study uses a quantitative approach and the analysis technique used is multiple linear regression analysis. The results showed that the independent variables of firm size and liquidity had an effect on capital structure both partially and simultaneously.Keywords: Company Size, Liquidity, Capital Structure, Blue Chip, Non-financial
