High and sustainable economic growth, that is an important indicator of life quality, is an essential condition in the realization of economic growth. In this regard, achieving strong economic growth in developing countries which mostly need development today, is one of the most debated topics. For many years, physical capital has been recognized as the most important determinant of economic growth. New approaches to economic growth have been developed since 1980s. In this context, according to endogenous growth theory, it is stated that the most important determinant of economic growth is the human capital stock. Today, while the subject of economic growth is examined, the effect of human capital on economic growth is intensively investigated. In this study, the impact of human capital on economic growth for selected 32 developing countries is investigated by panel data analysis method using data from the period 2000-2014. The focus of the study is also the direction and degree of effect of the increase in the level of education on economic growth. According to empirical analysis results, it is founded that human capital positively affects economic growth. It has also been found that its positive effect on economic growth has reduced while the education level has increased. On the other hand, the results of the analysis indicate that physical capital has a positive impact and that the labor negatively affects economic growth in the studied countries. However, it has been determined that the effect of human capital on economic growth is lower than that of physical capital.