The work gives study into the problem of the machinability of biomaterials. In the study used were three materials: 316 LVM, Ti-6Al-4V and Co-Cr-Mo, which are the most prevalent in biomedicine materials that found successful application as implants in the human body due to their good mechanical properties, corrosion resistance, and machinability process. A special review is given to theory of milling prosses and machinability. By use of the quick stop method samples of the chip root produced are suitable for the detailed metallographic analysis by a light or scanning el microscope. This chip compression ratio was used as the base for definition mentioned materials machinability