CENTRIFUGAL FAN AND ROTARY ELECTRIC MACHINE

In a conventional centrifugal fan having blades with unequal intervals, nz noise is modulated to frequency bands around the number of blades Z, while there is a problem that in particular high-frequency noise needs to be reduced. A centrifugal fan (1) includes: a main plate 2 having a rotation center (O); and a plurality of blades (4) extending from the main plate (2) in the rotation-axis direction passing the rotation center (0). The plurality of blades (4) include, at least partially, an arrangement in which intervals between the adjacent blades (4) are unequal intervals. A length direction of each blade (4) extends from an inner circumferential side to an outer circumferential side of the main plate (2). In a pair of the blades adjacent to each other with a smallest interval in a rotation direction among the plurality of blades (4), the blades (4_2) and (4_1) positioned on a backward side and a forward side in the rotation direction are different in outer-circumferential-side shapes, and an action of discharging a fluid toward the outer circumferential side by the blade (4_2) positioned on the backward side in the rotation direction is made smaller as compared to the blade (4_1) positioned on the forward side in the rotation direction.