To provide a vaporization type humidifier capable of controlling the humidification with high accuracy and preventing the generation of a noise.

This humidifier is provided with a vaporization type humidifying unit having humidification saturation efficiency of 80 % or more, a water supply line and a water discharge line for supplying and discharging the water for humidification to the vaporization type humidifying unit, a blower, a controller outputting a signal for controlling the rotation of a motor as a driving source of the blower, and a humidity sensor for measuring the humidity of a room to be humidified and transmitting a detection value to the controller. It is constituted so that the controller calculates the necessary humidification on the basis of the difference between a predetermined humidity and the present humidity detected by the humidity sensor, and outputs the signal for controlling the rotation of the motor of the blower to control the air supply to achieve the necessary humidification.