In recent years the impact of economic growth on environmental quality has attracted the attention of many scholars and experts. The second half of the 1990s, researchers have attempted to identify factors affecting the relationship between economic growth and environmental hazards and use them in models. One of the items that gives examined this relation is Environmental Kuznets Curve, which shows an inverse U-shaped relationship between environmental pollution and economic growth. This curve shows that economic growth destroys the environment in low-income levels, but when the income increases, harmful environmental impacts reduced. For this purpose, present study examined the relationship between economic growth and environmental quality in D8 member countries, including Bangladesh, Egypt, Indonesia, Iran, Malaysia, Nigeria, Pakistan and Turkey using panel data model in the period 1975-2012. The results show that the Environmental Kuznets Curve hypothesis is confirmed the studied countries.