The paper aimed to highlight the importance of adopting an economic extension and advisory system to promote the growth of the private sector in the African countries. To achieve this purpose, a sample of 384 employees affiliated with the private sector in several African countries was surveyed. To analyze the results of the survey, the descriptive analytical method was used. The study concluded that there were no statistically significant differences regarding the importance of the economic extension and advisory system in promoting the growth of the private sector in the African countries and it is essential for the governments to use such a system of guidance. The study recommended adopting an economic extension and advisory system in the private sector.