An axial flow fan provided herein allows for a wide range of selection for placement of the fan and wiring of the lead wires. The axial flow fan includes a first lead wire engaging portion 17 configured to be engaged with a plurality of lead wires 15 such that the lead wires are pulled out therefrom into an outer space OS defined between a first flange 21 and a second flange 23 of a fan housing 3, a second lead wire engaging portion 19 configured to be engaged with the plurality of lead wires 15 such that the lead wires, which have been engaged with the first lead wire engaging portion 17 and pulled out therefrom into the outer space OS, are then pulled out toward the other side in the axial direction where the second flange 23 is positioned, and a third lead wire engaging portion 27 configured to be engaged with the plurality of lead wires 15 such that the lead wires, which have been engaged with the first lead wire engaging portion 17 and pulled out therefrom into the outer space OS, are then pulled out in the axial direction toward one side where the first flange 21 is positioned. The third lead wire engaging portion 27 is formed in the first flange 21 at a given distance from the first lead wire engaging portion 17.