A rocket is a vehicle capable of transporting both cargo and crew. Rocket engines are widely used in space flights, where their great power and ability to operate in a vacuum are essential, but they can also be used to move missiles, airplanes and cars. The propulsion system of a rocket is known as the rocket motor, and its ultimate goal is to generate thrust. In liquidpropellant rockets, a pressurizing system pushes the propellants stored in the tanks into the combustion chamber, where the combustion gases are accelerated in a convergent-divergent nozzle, generating thrust. Injectors are devices responsible for the injection, atomization and mixing of propellants in the correct proportion within the combustion chamber of a rocket motor, and the jet-swirl injector used in this work may be employed for this purpose. The general objective of this work is to experimentally determine the velocity distribution of spray droplets from a jet-swirl injector, using the Particle Image Velocimetry (PIV) technique, and water as the only study fluid. For this purpose, an experimental bench was specially adapted to meet the needs of the experiment, containing the liquid feed system and the PIV system. As a result, we obtained velocity fields that were post-processed and resulted in a vector field with good spatial resolution, which is believed to best represent the velocity distribution of the droplets. It was also obtained the modules of the vectors found.