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 . <EOS>