In our economic life, traders use many contracts that allow manufactured products to reach a large number of potential customers and the material and moral rights to be transferred or constituted with a complete degree of legal security. Among these contracts, I quote for example, the commercial sale contract. This contract is not defined in Morocco's Commercial Code, which tackles only reselling purchases in the article 6 of law No 15-95, which constitutes the Moroccan Commercial Code of 1996, while the sales contract is defined and regulated by the Dahir of 1913, which constitutes the Law of Obligations and Contracts (L.O.C) without distinction between civil party and commercial one. In this context, there is also the legalization of several types of commercial sales through the Consumer Protection Law and the Free Prices and Competition Law, which is applied between traders and professionals in general. In this context, the importance of this research lies in determining the obligations of the parties in the commercial sale, because of their absence in the law of distribution and the diversity of the actors in the commercial sale contract. It will be through an analytical study of this topic. This study showed the inability of the above-mentioned laws to regulate trade, which requires reviewing of the Code of trade and the competencies of the Competition Council. In this context, we ask the question: What are the seller's obligations in the commercial sales contract? To study this subject, we will determine the seller's obligations under both contract code and competition law. Keywords: contract, commitment, producer, distributor, competition.