PROBLEM TO BE SOLVED: To provide a volatilization device for efficiently volatilizing a volatilization agent.SOLUTION: The volatilization device 10 includes: a supporting member 11 which is disposed at the front of an air blast hole A and has a rear wall part 21 provided with a ventilation hole penetrating therethrough a discharging container 12 for discharging a volatilization agent accommodated therein, which is disposed on the opposite side of the air blast hole A across the rear wall part 21 and supported by the supporting member 11 in the vertical direction Z an impregnated body 13 which is impregnated with the volatilization agent discharged from the discharging container 12 and sprayed with air from the air blast hole A through the ventilation hole and a fitting member 15 which is disposed on the rear wall part 21 so as to be fitted to the air blast hole A. A base 49 for supporting the lower end of the rear wall part 21 from below is connected to the fitting member 15.
