[Object] To provide a freeze-drying apparatus capable of achieving an increase of a processing capacity without causing a variation of a particle diameter.[Solving Means] A freeze-drying apparatus 100 according to an embodiment of the present invention includes: a freezing chamber 10 forming a vacuum chamber and an injector 25. The injector 25 includes a tube member 29 provided to the vacuum chamber, and a nozzle 9 including a plurality of injection holes 92 open to an inside of the tube member 29. The injector 25 injects a raw material fluid F, which is fed to the tube member 29, from the nozzle 9 into the vacuum chamber. The respective injection holes 92 are each formed so as to be open to the inside of the tube member 29, and hence the raw material fluid F is injected through the respective injection holes 92 at the same injection pressure. With this, it is possible to achieve the increase of the processing capacity without causing the variation of the particle diameter.
