To improve cooling performance of evaporators provided at front and rear seats respectively and, in particular, solve problems at a start or when a rear seat refrigerant load is small.

This control device for a refrigerating cycle includes the plurality of evaporators 5, 11 for evaporating a low pressure refrigerant which has passed through pressure reducing devices 4, 10. An accumulator 9 is provided on a downstream flow passage of the one evaporator 5, and an internal heat exchanger 3 is provided on a downstream flow passage of the accumulator 9. A downstream flow passage of the other evaporator 11 is merged with between the downstream flow passage of the accumulator 9 and an upstream flow passage of the internal heat exchanger 3. The pressure reducing device 10 on the other evaporator 11 side is constituted by fixation throttle. An opening of a flow rate control valve 16 is controlled so that a second detection temperature from the evaporator 11 becomes a temperature within a predetermined range on the basis of a first detection temperature from the evaporator 5.