Several factors threaten the integrity of aquatic ecosystem resources in the Democratic Republic of Congo. The banks of the Pool Malebo (Congo River) are also vulnerable to the presence of plastic pollution in its waters. This study aims to inventory the different types of microplastics in three compartments (water, sediment and fish) of the Congo River in the part of the Pool Malebo between the fishing stations of Maluku and Kinsuka in Kinshasa. The search for microplastics was carried out by trapping with the Manta net. The identification and classification of plastic debris recorded in the three compartments of the Congo River were done on the basis of the density of microplastics. The results obtained showed that the physical and chemical parameters of the waters of the Congo River in the Pool Malebo generally contribute to the disintegration of macroplastics into microplastics. All the digestive tracts of the sampled fish have microplastics and the consequences on the food chain are obvious especially tourists and other populations consuming these fish. From the point of view of relative abundance of waste, PELD with 35 debris or 79.5% are the most numerous than PP with 9 debris or 20.4%. Given the danger that microplastics represent for aquatic animals and human health, further research based on the characterization of plastic waste by more advanced techniques will provide additional information on the composition of microplastics present in the Malebo Pool.