An air conditioner comprising: a fan that causes air flowing in along an axial direction of a rotational shaft to flow out in a radial direction that intersects the axial direction; a heat exchanger that is disposed so as to surround an outer periphery of the fan and has a heat transfer pipe and a plurality of fins attached to the heat transfer pipe; and a plurality of rectifying plates that is attached to the heat exchanger on an inner peripheral side, extends along an axial line that is parallel to the rotational shaft, and linearly projects toward the rotational shaft, wherein the heat exchanger has a plurality of planar portions (18A,18B,18C,18D,18E) that is disposed along a plane that perpendicularly intersects the radial direction at a closest position to the fan, and a plurality of curved portions (18F,18G,18H,18I) that couples the plurality of planar portions (18A,18B,18C,18D,18E), a first rectifying plate out of the rectifying plates is attached to at least any of the plurality of planar portions at a first predetermined position on an upstream side in a rotational direction of the fan beyond the closest position while a second rectifying plate out of the rectifying plates is attached thereto at a second predetermined position on a downstream side in the rotational direction of the fan beyond the closest position, the first rectifying plate and the second rectifying plate are disposed to be adjacent to each other, characterized in that the first predetermined position is such a position that an angle formed between the radial direction passing through the closest position of the planar portions (18A,18B,18C,18D,18E) and the radial direction passing through a distal end of the first rectifying plate falls within a range of equal to or greater than 3 degrees and equal to or less than 7 degrees, and the second predetermined position is such a position that an angle formed between the radial direction passing through the closest position of the planar portions (18A,18B,18C,18D,18E) and the radial direction passing through a distal end of the second rectifying plate falls within a range of equal to or greater than 15 degrees and equal to or less than 20 degrees. a fan that causes air flowing in along an axial direction of a rotational shaft to flow out in a radial direction that intersects the axial direction; a heat exchanger that is disposed so as to surround an outer periphery of the fan and has a heat transfer pipe and a plurality of fins attached to the heat transfer pipe; and a plurality of rectifying plates that is attached to the heat exchanger on an inner peripheral side, extends along an axial line that is parallel to the rotational shaft, and linearly projects toward the rotational shaft, wherein the heat exchanger has a plurality of planar portions (18A,18B,18C,18D,18E) that is disposed along a plane that perpendicularly intersects the radial direction at a closest position to the fan, and a plurality of curved portions (18F,18G,18H,18I) that couples the plurality of planar portions (18A,18B,18C,18D,18E), a plurality of planar portions (18A,18B,18C,18D,18E) that is disposed along a plane that perpendicularly intersects the radial direction at a closest position to the fan, and a plurality of curved portions (18F,18G,18H,18I) that couples the plurality of planar portions (18A,18B,18C,18D,18E), a first rectifying plate out of the rectifying plates is attached to at least any of the plurality of planar portions at a first predetermined position on an upstream side in a rotational direction of the fan beyond the closest position while a second rectifying plate out of the rectifying plates is attached thereto at a second predetermined position on a downstream side in the rotational direction of the fan beyond the closest position, the first rectifying plate and the second rectifying plate are disposed to be adjacent to each other, characterized in that the first predetermined position is such a position that an angle formed between the radial direction passing through the closest position of the planar portions (18A,18B,18C,18D,18E) and the radial direction passing through a distal end of the first rectifying plate falls within a range of equal to or greater than 3 degrees and equal to or less than 7 degrees, and the second predetermined position is such a position that an angle formed between the radial direction passing through the closest position of the planar portions (18A,18B,18C,18D,18E) and the radial direction passing through a distal end of the second rectifying plate falls within a range of equal to or greater than 15 degrees and equal to or less than 20 degrees.