To enhance air blasting capacity increasing fan static pressure and the amount of air blasting.

This axial flow fan is equipped with a driving motor 54 having its rotary shaft 54a over a frame axial line by a fan frame 52 by way of a stay 2, and with a rotary vane 3 having a plurality of vanes 3a located in the inside of the fan frame 52 fixed to the rotating shaft 54a of the driving motor 54. It is so constituted that, in a plane normal to the frame axial line, the rotary vane 3 is in parallel with respect to the forward end periphery 2A in the rotating direction of the motor for the saty 2, in a condition just before the forward end periphery 3A in the rotating direction of each vane 3a passes through the stay, and the rotary vane is positioned at a place close to the stay 2.