The purpose of this study is to examine the effects of economic growth on the environment in the Republic of Congo. The analysis was based on the validity of the Kuznets environmental curve. For this purpose, the Johansen co-integration test (1988) and the VECM model were used over the period 1971-2014. The results of the study show that there is a long-term relationship between CO2 emissions and GDP. This last relationship suggests that in the long run, there is a Kuznets environmental curve in the Republic of Congo.