The ISO 9000 series standards have a long, over 30-year tradition. These are the most popular standards among all international ones. Having a system certificate according to the ISO 9001 standard strengthens the reputation of the organization and gives a signal that the company attaches great impor­tance to international standards and strives for improvement. The paper presents the history of ISO 9000 standard amendment. Analyzing the structure and contents of the PN-EN ISO 9001:2015-10 standard, fundamental differences between the considered standard and its previous edition have been presented.