PROBLEM TO BE SOLVED: To provide a parallel inverter device having a DC / AC inverter or the like, which can easily perform parallel operation control due to an increase in power capacity and the like without using a control line connecting the inverter devices. . SOLUTION: A switch section 15 is provided on an output line to which a load 40 is connected, in which two MOSFETs are arranged so as to be in series with the load and face each other so that the energizing directions are opposite to each other, and the switch section 15 is connected in parallel. From the polarity of the AC voltage output from the filter circuit 10 of the inverter device 1 and the direction of the current flowing through the load 40 on the output line, ON / OFF of each MOSFET of the switch unit 15 is controlled to cut off the cross current, and The phase difference and the voltage difference between the load voltage and the AC voltage output from the filter circuit 10 are controlled to be reduced to prevent the occurrence of cross current. [Selection diagram] Figure 1
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