The metal industry is an important part of industrialized economies. It is not possible to imagine the development of such sectors as construction, automotive, or household appliance production without products of the metal sector. Moreover, metals are renewable raw materials, which is especially important for sustainable development. The main objective of the paper is to present management trends in metal market enterprises in Poland in the context of innovative activities. The paper characterizes this sector, presenting its importance for the Polish economy, and analyzes innovative activities of enterprises producing metals and metal products. To this end, domestic and international statistics were gathered and presented, supplemented with questionnaire surveys of a group of 112 enterprises from this sector. The presented results are broken down into small, medium-sized, and big enterprises, indicating differences in premises guiding enterprises when making managerial decisions in the field of innovation. Also, barriers to be overcome by metal sector enterprises differing in employment size are presented. The paper proves, e.g., that for all groups of surveyed enterprises, the process innovations are the most important, while product innovations are less important for small enterprises because this group of companies mostly manufactures very simple basic metal products.