Working capital management is becoming important for companies to maintain the continuity of their operations. This study aims at investigating the influence of the selection of sources of financing on working capital management. This study uses entire manfufaktur companies listed on the Indonesia Stock Exchange (BEI) as the population. The sample selection of current study uses purposive sampling method. Regression analysis was used to test the effect of each variable such as total debt, current debt and equity on working capital. The results showed that the total debt and equity have positive effect on working capital, while current liabilities do not have significant impact on working capital. The influence of both long-term source of financing, i.e. long term debt and equity, on working capital indicates that the manufacturing companies have enough large portion of permanent working capital.