Laser material processing includes the application of lasers for achieving different manufacturing goals. The advantages include an accessible spacing between the sample surface and the laser source, enabling real-time inspection of the process, simplifying the quality control process, and relatively lower costs. In particular, selective laser sintering is a manufacturing process that uses laser and powder to generate a three-dimensional model based on the concept of rapid prototyping. This chapter covers basic working principles and instrumentation settings of these laser processes.