The objective of this paper is to assess the effect of institutional governance on the relationship between the reaction of monetary authorities when the economy faces a shock and economic growth in the countries of the Sub- Saharan Africa. To achieve this, econometric estimates were made using the Generalized Moment Method (MMG) in a dynamic panel of 36 countries in the zone over the period from 2000 to 2018. The results obtained show that monetary policy as a policy macroeconomic is not a tool for stabilizing economic activity. This low level of democracy in these countries therefore has the effect of amplifying this pro-cyclical behavior of monetary policy. Governments genuinely infer in the implementation of monetary policies, thereby causing this pro-cyclical bias.