It is well known that one of the important aspects of achieving sustainable development is to preserve macroeconomic stability, which is closely related to the extent of capital mobility. Given the importance of the subject for open economies, this paper examines the degree of capital mobility for African countries by using among other methodologies the Feldstein- Horioka coefficients. To determine those coefficients, we use time series data and methods, along with the Dynamic Heterogeneous panel approach. We find significant cross-country heterogeneity in the dynamic of income per capita, investment rate, and saving rate; and conclude that it is invalid to pool data across our sample countries. Furthemore, the empirical findings reveal that for African countries included in the sample, the estimated saving retention coefficients are at the same time, small and high indicating respectively higher and lower degrees of capital mobility and therefore, challenging the results of Feldstein – Horioka on developing countries.