An axial fan , comprising: a hub having a rotation shaft (RS) and configured to be driven to rotate; and blades provided to the hub , the blades each having a front edge portion and a rear edge portion , in a first blade section (BS) that is a section of a portion between the front edge portion and the rear edge portion of each of the blades along a direction (DR) in which the blades rotate, the first blade section (BS) being an area of each of the blades that is further inward than an outer periphery edge portion that is a most radially outer periphery in each of the blades , the blades each having a projection portion and a first recess portion , the projection portion projecting from a portion of a pressure surface of each of the blades , the first recess portion receding from a portion of the pressure surface that is between the projection portion and the rear edge portion , in a second blade section (BS2) that is a section of a portion between the front edge portion and the rear edge portion of each of the blades along the direction (DR) in which the blades rotate, the second blade section (BS2) being further radially outward than the projection portion , the second blade section (BS2) being an area of each of the blades that is further inward than the outer periphery edge portion , the blades each have an outer periphery recess portion receding from a portion of the pressure surface that is between the front edge portion and the rear edge portion in a whole of each of the blades , characterized in that the projection portion has a projection top that is a top of the projection portion and is closer to the rear edge portion than is a center between the front edge portion and the rear edge portion in the first blade section (BS). a hub having a rotation shaft (RS) and configured to be driven to rotate; and blades provided to the hub , the blades each having a front edge portion and a rear edge portion , in a first blade section (BS) that is a section of a portion between the front edge portion and the rear edge portion of each of the blades along a direction (DR) in which the blades rotate, the first blade section (BS) being an area of each of the blades that is further inward than an outer periphery edge portion that is a most radially outer periphery in each of the blades , the blades each having a projection portion and a first recess portion , the projection portion projecting from a portion of a pressure surface of each of the blades , the first recess portion receding from a portion of the pressure surface that is between the projection portion and the rear edge portion , in a second blade section (BS2) that is a section of a portion between the front edge portion and the rear edge portion of each of the blades along the direction (DR) in which the blades rotate, the second blade section (BS2) being further radially outward than the projection portion , the second blade section (BS2) being an area of each of the blades that is further inward than the outer periphery edge portion , the blades each have an outer periphery recess portion receding from a portion of the pressure surface that is between the front edge portion and the rear edge portion in a whole of each of the blades , characterized in that the projection portion has a projection top that is a top of the projection portion and is closer to the rear edge portion than is a center between the front edge portion and the rear edge portion in the first blade section (BS). <EOS>