Cooling device of electric drive axle

The utility model provides a cooling device of an electric drive axle. In a cooling device for cooling oil for cooling the interior of an electric drive axle by using a heat exchanger, an electric pump for circulating oil in the electric drive axle is integrated with the heat exchanger, so that the number of components is reduced and the structure is simplified. The present invention is provided with: an electric pump (30) that circulates oil within an electric drive axle and cools the electric drive axle; and an oil cooler (40) constituting the heat exchanger. An electric pump is provided with a motor (31), an internal gear pump (32), and a motor housing (33) that houses the motor (31) and the internal gear pump (32). The motor housing has an oil suction port (33b) formed on one end side of a rotating shaft (31a) of the motor and an oil discharge port (33c) formed on the other end side, and oil circulates in the motor. The oil cooler is provided with a cooler housing (42) covering the motor housing from the