Provided is a motor drive device capable of adjusting a 0-axis current to a desired value.A motor drive device (inverter device 100) for an open winding type motor 200 in which a stator winding wire includes three-phase independent winding wires 210, 220, and 230 includes a plurality of single-phase inverters 160, 170, and 180 provided for each of the winding wires 210 to 230 to individually apply a voltage to a corresponding winding wire, and a controller 150 that controls each of the single-phase inverters 160 to 180. The controller 150 adjusts a 0-axis current to a predetermined value by alternately and repeatedly generating a first period in which a sum of voltages applied to the respective independent winding wires 210 to 230 is set to a value other than zero to offset the 0-axis current and a second period in which the sum of the voltages applied to the respective winding wires 210 to 230 is set to zero.