Abstract: A room air-conditioning device controls the temperature of a room without making people in the room uncomfortable even during a transient period in which an influence of a disturbance is conspicuous. The air-conditioning device comprises a blower drive unit, a temperature detector for detecting the temperature of air supplied by a blower, a temperature setting unit for setting a target temperature of air, a temperature information operation unit for providing temperature information to be provided to a temperature adjusting unit and the blower drive unit, according to the signals from the temperature detector and temperature setting unit, an elapsed time operation unit for calculating an elapsed time of the operation of the air-conditioning device; and a blower drive voltage setting unit for providing a blower drive voltage signal according to the temperature information and elapsed time.