This word is focused on a comparative analysis of the effectiveness of monetary policy instruments used in the Democratic Republic of Congo from 1987 to 2018. The objective of this work was to analyze the impact of these monetary policy instruments on the effectiveness of the country's monetary policy.Our primary concern was to determine the impact of the monetary policy instruments used by the Central Bank of Congo (BCC) on its monetary policy effectiveness during the period under review. We hypothesized that the monetary policy instruments used in the DRC would be less effective in achieving the BCC's final objectives during this period.To verify our hypothesis and achieve our objective, we used statistical and econometric methods on time series data, including correlation, causality, and VAR modeling.