A gate drive circuit of the present invention is a gate drive circuit for driving an insulated gate switching element, which comprises a control drive circuit for applying a driving voltage to a control terminal of the switching element at a predetermined timing, and a voltage monitoring circuit for monitoring both a first voltage which is a power supply voltage of the control drive circuit and a second voltage which negatively biases the control terminal of the switching element, and in the gate drive circuit, the control drive circuit cuts off an output when at least one of the first and second voltages monitored by the voltage monitoring circuit becomes lower than a threshold value. It is an object of the present invention to provide an insulated gate switching element which can suppress wrong ON.