Centrifugal blower and electric vacuum cleaner

Provided is a centrifugal blower in which an impeller has a first side plate, a second side plate, and blades. The direction of an air flow immediately after the air flow flows out of the impeller is changed by a deflecting air passage to the outlet direction, that is, toward one axial side of the impeller. The first side plate is located downstream of the second side plate in the outlet direction. The rear edges of the blades each have a rear edge tip at the radially outermost position of the impeller, and protrude outwards in the radial direction of the impeller over the interval from the section from the portion adjacent to the second side plate to the rear edge tip. The axial positions of the rear edge tips are located downstream, in the outlet direction, of the center between the axial position of the outer periphery of the first side plate and the axial position of the outer periphery of the second side plate.