Abstract. Over the past few years, Islamic banking has continued to experience weakening growth in collecting Funding. So we need to know the determinants that are very influential in the growth of Funding. The purpose of this study is to find out the external factors in the form of macroeconomic indicators that can influence the growth of Islamic Banking Third Party Funds in Indonesia. Hypothesis testing of this study using analysis with the Multiple Linear Regression model. The results of this study indicate that the Rupiah Exchange Rate, BI Rate, Gross Domestic Product, and the Composite Stock Price Index have a significant effect on Funding. Besides, simultaneous macroeconomic factors significantly influence Funding.Abstrak. Selama bebe...