This study to explain the effect of profit sharing, bank size, number of offices, inflation and Gross Domestic Product (GDP) on mudharabah savings. The population used in this research is Islamic commercial banks registeres with the Financial Services Authority (OJK) for the 2015-2019 period. The sampling method using purposive sampling, as many as 5 companies that match the criteria. The data source used in this study is secondary data ini the form of quarterly financial reports. The data analysis technique used is multiple linier regression. After testing, the result are obtained for the result, bank size, number of offices, inflation and Gross Domestic Product simultaneously affect mudharabah savings. Bank size and number of offices partially have a positive and significant effect on mudharabah deposits. Meanwhile, for the result, inflation and GDP partially do not have a significant effect on mudharabah savings.