An inverter device includes: an inverter circuit which includes an upper-arm-use first switching element (328U to 328W) and a lower-arm-use second switching element (330U to 330W); a control circuit (319) which outputs a first signal which is an ON/OFF command for the first switching element and a second signal which is an ON/OFF command for the second switching element respectively; a first drive circuit (610U to 610W) which performs ON/OFF driving of the first semiconductor switching element based on the ON/OFF command which is the first signal; a second drive circuit (611U to 611W) which performs ON/OFF driving of the second semiconductor switching element based on the ON/OFF command which is the second signal; and a signal switching part (616U to 616W) which directly inputs the first and second signals outputted from the control circuit to the corresponding first and second drive circuits respectively when at least one of the first and second signals is an OFF command, and interrupts inputting of the first signal to the first drive circuit and inputting of the second signal to the second drive circuit and inputs a third signal which is an OFF command to the first and second drive circuits when both the first and second signals are ON commands.
