To provide a volatilization component diffusing apparatus by which a volatilization component from a substance containing volatilization component is efficiently mixed with air with high humidity comprising vapor and diffused so as to easily generate a natural flavor.

The apparatus is provided with a heating unit (diffusing means) 43 for volatilizing the volatilization component in the substance 4 containing volatilization component and an ultrasonic wave unit (vapor generating means) 5 for generating vapor by giving an ultrasonic wave vibration to water 2. Then the volatilized volatilization component A is mixed with air containing vapor and diffused toward an outer side.