This study demonstrates the analysis of knowledge, practices and attitudes of market gardeners in the city of Kinshasa regarding the use of pesticides and their impact on human health and the environment. It covered 8 selected vegetable sites including Cecomaf, Rifflaert, Lemba-Imbu, Monastery, Saïo, Tshuenge, Mombele and Kimpoko among the 27 listed for a quantitative survey type CAP structured 740 market gardeners. All gardeners surveyed systematically use pesticides including organophosphorus commonly known as "Thiodan" (94.6%). The majority of market gardeners (94.9%) have not received any training on the use of plant protection products and do not have a good knowledge of application rates and treatment frequencies. The diversity of phytosanitary treatment methods is explained by the lack of training and especially by the lack of supervision of market gardeners that could have mitigated the harmful effects on the human environment such as vertigo, nasal congestion, colds, redness, eyes, nausea and vomiting ..., and the physical environment.