An atomization device 1 comprises a casing 2, a rotor 3 disposed rotatably with respect to the casing 2, and a stator 4 disposed on the same axis line with the rotor 3. The rotor 3 includes a first rotor cylinder portion 33 and a second rotor cylinder portion 34 which have a plurality of through-holes provided in peripheral walls thereof and which are disposed concentrically. The stator 4 includes a main-stator cylinder portion 42 and an inside sub-stator cylinder portion 43 which have a plurality of through-holes provided in peripheral walls thereof and which are disposed concentrically. The rotor 3 is fixedly positioned with respect to the casing 2. The stator 4 is movable by a lifting/lowering means 7 in the axial line L direction.