The invention provides a control device of an electric apparatus. Even if a storage battery cannot charge on a rechargeable device when a hybrid car is in a braking state, the control device can still realize a high NV performance. The hybrid car comprises an internal combustion engine; a first dynamotor (MG1) utilizing the power of the internal combustion engine to generate electricity; a storage battery; a second dynamotor (MG2), which is driven power generated by at least one of the storage battery and MG1; and a booster, which is boosted by the input voltage from MG2 when the MG2 executes as a motor. The control device of the hybrid car controls MG1 as an electric motor by the regenerative power obtained by operating MG2 as a generator when braking of the hybrid car, and when the load of the MG1 is an internal combustion engine, the MG1 is controlled so that MG1 is controlled by the booster the active voltage of the MG1 is boosted by the input voltage of the MG1, and the operating range of the MG1 is driven.