An axial flow fan (100) is provided with a propeller fan (1) and a motor (4) which rotates the propeller fan (1). The propeller fan (1) has a hub (2) and blades (3) supported by the hub (2). The pressure surface (9b) of each of the blades has a protrusion-shaped section (11) bent so as to protrude to the suction side (6). In each of the blades, the height of the protrusion-shaped section (11) measured on the rear edge side of the blade is greater than the height of the protrusion-shaped section (11) measured on the front edge side, and the radial position of the rear edge-side portion of the crest (11c) of the protrusion-shaped section (11) is located on the inside radially of the radial position of the front edge-side portion of the crest (11c) of the protrusion-shaped section (11).
