A power conversion device that converts power between DC and AC, the device comprising: a switching module that includes a power semiconductor element as a switching element; a gate driver that outputs a drive signal for driving the switching element to a control terminal of the switching module; and a wiring body that connects the control terminals of the switching module and output terminals of the gate driver using a plurality of conductors (108A, 108B) opposing each other in a planar manner with an interval therebetween, wherein the wiring body includes a first conductor and a second conductor as the plurality of conductors, wherein the first conductor and the second conductor are configured using flat plates that are arranged in parallel with each other, wherein the first conductor connects one terminal of the control terminals of the switching module to one terminal of the output terminals of the gate driver, wherein the second conductor connects the other terminal of the control terminals of the switching module to the other terminal of the output terminals of the gate driver, wherein when each width of the first conductor and the second conductor is W and an interval between the first conductor and the second conductor is d, W/d≥5 is satisfied, and wherein a capacitor is connected between a first wiring connecting the gate driver to the first conductor and a second wiring connecting the gate driver to the second conductor, wherein the capacitor is positioned on the gate driver side apart from the switching module through the wiring body, wherein the switching module accumulates a current based on a feedback capacitance between a main terminal of the switching module and the control terminal into the capacitor through the wiring body, so that fluctuation of a voltage of the control terminal is suppressed by reducing the inductance between the switching module and the gate driver with the wiring body. a switching module that includes a power semiconductor element as a switching element; a gate driver that outputs a drive signal for driving the switching element to a control terminal of the switching module; and a wiring body that connects the control terminals of the switching module and output terminals of the gate driver using a plurality of conductors (108A, 108B) opposing each other in a planar manner with an interval therebetween, wherein the wiring body includes a first conductor and a second conductor as the plurality of conductors, wherein the first conductor and the second conductor are configured using flat plates that are arranged in parallel with each other, wherein the first conductor connects one terminal of the control terminals of the switching module to one terminal of the output terminals of the gate driver, wherein the second conductor connects the other terminal of the control terminals of the switching module to the other terminal of the output terminals of the gate driver, wherein when each width of the first conductor and the second conductor is W and an interval between the first conductor and the second conductor is d, W/d≥5 is satisfied, and wherein a capacitor is connected between a first wiring connecting the gate driver to the first conductor and a second wiring connecting the gate driver to the second conductor, wherein the capacitor is positioned on the gate driver side apart from the switching module through the wiring body, wherein the switching module accumulates a current based on a feedback capacitance between a main terminal of the switching module and the control terminal into the capacitor through the wiring body, so that fluctuation of a voltage of the control terminal is suppressed by reducing the inductance between the switching module and the gate driver with the wiring body.