The utility model provides a mist generating device, it can generate the cold fog of normal atmospheric temperature and the warm fog of being heated respectively effectively to, can not generate the temperature fog in order there to be the uneven state of temperature. The fog supply route (3) that is equipped with fog production portion (2) and flows and guide the cold fog that generates by fog production portion in the inside of main part casing (1). The fog is supplied with the route and is gone into oral area (21) from the fog with fog production portion opposition and form towards the fog export department (22) of the surface of main part casing. Be equipped with on the route is supplied with to the fog and carry out the heating portion (4) of heating to cold fog. Heating portion possesses the heating member (K) that carries out radiating heat transfer parts (31) including electric heating element (30) with to its heat. Supplying with the route, the fog set up heating cavity (23) of taking in electric heating element and heat transfer parts on. The heating is in the cavity, sets for over half for the sectional area (S) that occupies the heating cavity with the sectional area (S1) in electric heating element and heat transfer parts shared imaginary spaces.
