To provide a cooling device for a motor capable of improving cooling performance of the motor by a liquid medium.

A stator of a motor includes: an iron core that has a plurality of teeth 136 (A1); coils 138 (A1) wound around the plurality of teeth 136 (A1); and insulating bobbins 137 that are interposed among the teeth 136 (A1) and the coils 138 (A1) and define wiring regions of the coils 138 (A1). Further, the insulating bobbins 137 have inner peripheral side flanges 140 that extend in directions intersecting with radiation directions at inner peripheral sides in the radiation directions. A case includes: extending portions 149 that extend from an inner wall 148 facing a side surface outside a rotational axis of the motor; and discharging ports 112A which are oriented toward the motor and through which oil for cooling the motor is discharged. Furthermore, in an accommodated state where the motor is accommodated in the case, vertically below the discharging ports 112A, the inner peripheral side flanges 140 of the insulating bobbins 137 and the extending portions 149 of the case are overlapped with one another as seen from the radiation directions, are arranged in contact with one another or are arranged opposite to one another in close proximity to one another.