CENTRIFUGAL FAN

PROBLEM TO BE SOLVED: To improve blast efficiency in a thin centrifugal fan.SOLUTION: A centrifugal fan is provided with an impeller having a central axis as a center, a motor part rotating around the central axis, and a housing which houses the impeller. The fan is provided with a side wall part 33 which covers a lateral side of the impeller and forms a blast port together with an upper plate part 31 and a lower plate part. Either the upper plate part 31 or the lower plate part has an intake port. A wind tunnel part encircling the impeller is composed of the upper plate part 31, the side wall part 33, and the lower plate part. A linear rectifying member 35 extended along a boundary 350 is placed at the boundary between either a lower surface 312 of the upper plate part 31 or an upper surface of the lower plate part and an inner surface 333 of the side wall part 33. The rectifying member 35 includes a rectifying surface 351 which stretches from the one surface 312 to the inner surface 333, and stretches outward in the radial direction as it separates from the surface 312.