A device for controlling an engine for a vehicle and an air-conditioning device for a vehicle capable of suitably controlling the blow-out rate of an air-conditioning compressor at the time when the fuel supply has been cut by estimating a load torque of the air-conditioning compressor under a condition of resuming the fuel supply. The receiving section receives a control cell from an upstream node. Accordingly, the area in the LPF occupied by the second capacitor can be prevented from increasing even when its capacitance value is increased.