When a dehumidifying heating operation is performed by a heat-radiating operation of the interior condenser and a heat-absorbing operation of the exterior heat-exchanger and the evaporator, a control device of an air conditioner for vehicle decreases the valve opening degree of the electronic expansion valve to be equal to or less than a predetermined opening degree before opening the solenoid valve for dehumidification in a closed state, opens the solenoid valve for dehumidification after decreasing the valve opening degree of the electronic expansion valve to be equal to or less than the predetermined opening degree, and then increasing the valve opening degree of the electronic expansion valve to be greater than the predetermined opening degree after opening the solenoid valve for dehumidification.