The article is devoted to the issues of codification of the Civil and Commercial legislation. Chaos, which take place in legal regulation of private relations due to differences and contradictions between the Civil Code of Ukraine and the Commercial Code of Ukraine, complicates business relations in Ukraine, leads to contradictions in the practice of entrepreneurs and multiplies litigation, repels investors and more.Prominent civilians of Ukraine developed the concept of the Civil Code of Ukraine during 1992-1996. On January 16, 2003, the Verkhovna Rada of Ukraine finally approved the Civil Code of Ukraine and the Commercial Code of UkraineAt the development of the Civil Code of Ukraine was used the legislative experience of European countries, in particular, the Netherlands, Germany, and France.In contrast, the Commercial Code of Ukraine was partially created based on the administrative-command system of regulation of the state economy. The Commercial Code of Ukraine contains instructions that oblige public authorities (legislative and executive) to perform the functions assigned to them under the Constitution of Ukraine, relevant laws and regulations. Certain provisions of the Commercial Code of Ukraine even replace the norms of legislation that define the functions and procedures of the Cabinet of Ministers of Ukraine, local state administrations, and legislation that regulates the principles of organization and activities, legal status and responsibilities of the bodies and officials of local self-government.During the 16 years of acting of these Codes, each of them has been amended more than 100 times. Many changes have taken place in Ukraine and the in the world during these years.The purpose of this article is to analyze certain norms of mentioned Codes in order to find the ways of its improvement. As a result of the research, it is proposed to revise the norms of the Commercial Code of Ukraine, which need to be improved and place them in special laws or in the relevant sections of the Civil Code of Ukraine. The conclusion on expediency of abolition of the Commercial Code of Ukraine in the process of re-codification was made.