A motor drive apparatus includes a smoothing capacitor unit including at least one smoothing capacitor provided between a converter circuit and an inverter circuit in a power conversion circuit that generates motor drive power, a snubber capacitor for suppressing a surge voltage of a power device forming a part of the power conversion circuit, and a support plate on which the smoothing capacitor unit is mounted, wherein an electrode terminal of the smoothing capacitor unit and an electrode terminal of the snubber capacitor are placed in proximity to each other with the support plate being sandwiched between them, and a positive electrode terminal of the smoothing capacitor unit and a positive electrode terminal of the snubber capacitor are electrically connected to each other, and a negative electrode terminal of the smoothing capacitor unit and a negative electrode terminal of the snubber capacitor are electrically connected to each other.