The objective of this paper is to demonstrate that regional economic integration can contribute to the emergence of Cameroon. Our research hypothesis is that limiting trade barriers increases the quantity of Cameroon's exports to the CEMAC sub-region and makes it more competitive. In the light of the econometric analysis based on the error correction model (ECM), the econometric estimation of the relationship between GDP per capita, investment, the trade liberalization index, etc., has led us to say that trade openness, supported by regional integration indices, has a positive impact on the Gross Domestic Product (GDP) per capita in Cameroon. Thus, trade openness will allow Cameroon to raise the standard of living of its populations and to achieve the objective of its vision of emergence in 2035, provided that the related provisions are an effective reality and that the market is considered as such.