Mudharabah deposit is one of main fund resource of sharia bank, teherefore the growth must be maintained. This research is aimed to find whether there are influences of profit-sharing rate of mudharabah saving, interest rate of saving in conventional bank, growth rate of Jakarta Islamic Index (JII), and Gross Domestic Product (GDP) to the amount of mudharabah saving in sharia banks. The sharia banks which are used in this research are all of sharia commercial bank in Indonesia.The method of this research is Ordinary Least Square (OLS) with quarterly panel data from 2006 to 2015 of the twelve sharia banks which are observed. The approach model which is used in this research is Fixed Effect Model. The result of this research showed that profit-sharing rate of mudharabah saving, interest rate of saving, growth rate of Jakarta Islamic Index (JII), and Gross Domestic Product (GDP) have significant influences to the amount of mudharabah saving in sharia banks. Profit-sharing rate of mudharabah saving, growth rate of Jakarta Islamic Index (JII), and Gross Domestic Product (GDP) have positive influences to the amount of mudharabah saving, Meanwhile, interest rate of saving in conventional bank has a negative influence to the amount of mudharabah saving.