The purpose of this research is to examine the effect of disclodure level to cost of equity and the significancy of the influence to companies with bluechips and nonbluechips stock. Thirty listed companies in Jakarta Stock Exchange (JSX) selected based on certain criteria were used as research sample. Data are collected from documentation of financial statements and are analyzed by using statistical tool i.e. multiple regression. This research indicate that there is significant influence of disclosure level to cost of equity. However, this research cannot prove that there is a significant different of the influence of disclosure level to cost of equity to the companies with bluechips and nonbluechips stocks.