PURPOSE: To obtain a good air-conditioning feeling, when the blower control quantity by means of the total of the right and left target blowing quantities is larger than the temperature controlling blower control quantity, by controlling a blower by the control quantity by means of the total of the right and left target blowing quantities, and also by calculating the right and left air distribution ratios for carrying out air distribution control.

CONSTITUTION: A solar radiation quantity calculating means 100 calculates the right and left solar radiation quantities and the solar radiation quantity for control use on the basis of the outputs produced from solar radiation sensors 39, 40, and a target blowing temperature calculating means 110 calculates a target temperature of air to be blown into a vehicle room. On the basis of this, a temperature-controlling blower control quantity calculating means 120 calculates the control quantity of the blower, and a right and left target blowing air quantity calculating means 130 calculates the right and left blowing air quantities for the vehicle room 6 through the right and left solar radiation quantities, and on the basis of the total value, a distribution-air blower control quantity calculating means 140 calculates the control quantity of the blower. And, a control quantity selecting means 150 compares the calculated results of the calculating means 120 and 140, and selects the one having a larger control quantity.