The article presents changes that took place in the textile and apparel (T&A) industry in Poland in the years 2004–2020. To describe the changes, we adopted the supply chain management perspective, which allowed for a global view of the changes taking place. We discuss the basic characteristics, such as the size and structure of the industry, innovation, production value, and the use of information and communications technology (ICT). In the research, we used the databases of the Central Statistical Office (GUS) on the sold production of the T&A industry, as well as imports and exports. Our research shows that, at the level of basic characteristics, the industry is close to the European model. However, it is characterized by a smaller share of small companies in the structure of enterprises. The research showed an upward trend in the production of sold textiles and, to a lesser extent, apparel. At the same time, the operation of the Polish T&A industry is influenced by the import of finished products and raw materials from China, Germany, Bangladesh, and Turkey. The export is directed to the German, Czech, Romanian, and Ukrainian markets. The article provides an overview of the development trends in the Polish T&A industry in the broad context of international conditions.