A drive device comprising: a housing; and a rotary electric machine and a transmission housed in the housing, wherein a lubricating oil for lubricating a gear of the transmission is stored in a bottom portion of the housing, and the housing includes a refrigerant passage through which a refrigerant for cooling the rotary electric machine flows, a storage portion adjacent to the refrigerant passage and configured to temporarily store the lubricating oil scooped up by the gear of the transmission, an outer housing having a cylindrical space therein, and an inner housing provided inside the outer housing, wherein the outer housing includes a partition wall portion that separates a rotary electric machine chamber in which the rotary electric machine is housed and a transmission chamber in which the transmission is housed, the inner housing is mounted on an inner periphery side of the rotary electric machine chamber, characterized in that the refrigerant passage is formed between the partition wall portion of the outer housing and the inner housing, and the refrigerant passage and the storage portion face each other with the partition wall portion interposed therebetween, the inner housing is fixed by a fixing portion inscribed in the outer housing in a vicinity of the partition wall portion of the outer housing, a first refrigerant passage is formed between an inner periphery of the rotary electric machine chamber of the outer housing and the inner housing, a second refrigerant passage is formed between the partition wall portion on a rotary electric machine chamber side of the outer housing and the inner housing, and the first refrigerant passage and the second refrigerant passage communicate with each other through a communication hole formed in the fixing portion. a housing; and a rotary electric machine and a transmission housed in the housing, wherein a lubricating oil for lubricating a gear of the transmission is stored in a bottom portion of the housing, and the housing includes a refrigerant passage through which a refrigerant for cooling the rotary electric machine flows, a storage portion adjacent to the refrigerant passage and configured to temporarily store the lubricating oil scooped up by the gear of the transmission, an outer housing having a cylindrical space therein, and an inner housing provided inside the outer housing, wherein a refrigerant passage through which a refrigerant for cooling the rotary electric machine flows, a storage portion adjacent to the refrigerant passage and configured to temporarily store the lubricating oil scooped up by the gear of the transmission, an outer housing having a cylindrical space therein, and an inner housing provided inside the outer housing, wherein the outer housing includes a partition wall portion that separates a rotary electric machine chamber in which the rotary electric machine is housed and a transmission chamber in which the transmission is housed, the inner housing is mounted on an inner periphery side of the rotary electric machine chamber, characterized in that the refrigerant passage is formed between the partition wall portion of the outer housing and the inner housing, and the refrigerant passage and the storage portion face each other with the partition wall portion interposed therebetween, the inner housing is fixed by a fixing portion inscribed in the outer housing in a vicinity of the partition wall portion of the outer housing, a first refrigerant passage is formed between an inner periphery of the rotary electric machine chamber of the outer housing and the inner housing, a second refrigerant passage is formed between the partition wall portion on a rotary electric machine chamber side of the outer housing and the inner housing, and the first refrigerant passage and the second refrigerant passage communicate with each other through a communication hole formed in the fixing portion.