Production is processing of raw material toward the creation a new product and it starts with the idea and needs of the market. When we talk about modern production, new technologies for making parts appears. The basic division of additive technology processes is into material deposition processes, processes based on powder materials and on liquid materials. [1] In this thesesis, the emphasis will be on 3D printers and safety during use this technology, which are primarly used for creating prototypes, but they are increasingly used in small and industrial production. 3D printers open up a wide spectrum of creative possibilities, they contain numerous advantages, but also disadvantages, and the most important thing to point out is that 3D printers will have great importance in the future of production. Due to all above, the issue of protection during use additive technologies (3D printers) appears, which is the main part of this thesesis. This final thesesis will present the hazards during use 3D printers and, of course, appropriate personal protective equipment and protective devices, and finally brief instructions for working in a safe manner. [2]