Congolese commercial law is a set of private law rules governing commercial activities. Despite the existence of the general commercial law of the Organization for the Harmonization in Africa of Business Law (Ohada) to which the Democratic Republic of Congo (DRCongo) has adhered, commercial activities remain subject to non-conflicting Congolese national laws. in Ohada. This enshrines a legal dualism in private law within the Congolese legal order.This work is based on Ohada law and on the particularities of Congolese national law supplementing this community law in order to identify the main legal rules applicable to commercial activities in DR Congo.In a simple and clear style, the author structures, details, defines and explains in a synthetic way the main rules governing commercial activities in DR Congo.This Congolese commercial law brief is therefore intended for law students, teachers and practitioners who wish to know precisely the essentials of these rules.