Centrifugal fan and rotary electric machine

A centrifugal fan comprising:

• a main plate having a rotation center;
• and
• a plurality of blades extending from the main plate in a direction of a rotation axis passing the rotation center, a number of the plurality of blades being Z, wherein
• the plurality of blades include, at least partially, an arrangement in which intervals between the adjacent blades are unequal intervals,
• a length direction of each blade extends from an inner circumferential side to an outer circumferential side of the main plate, and
• where, among the plurality of blades, an angle formed by outermost circumferential ends of the blades adjacently positioned on the forward side and the backward side in the rotation direction with respect to the rotation center is denoted by P,
• in a pair of the adjacent blades that satisfy P<360°/Z, the blade positioned on a backward side in the rotation direction and the blade positioned on 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 positioned on the backward side in the rotation direction is made smaller as compared to the blade positioned on the forward side in the rotation direction.