The invention pertains to a blower (10). The blower (10) comprises a housing (11) having an intake port (16) and a flow passage (22) that communicates with a discharge port (17) an impeller (13) disposed in the housing (11) so as to have a front surface facing the intake port (16) and a partitioning member (15) that is disposed toward a rear surface of the impeller (13) to partition an inside of the housing (11) into a space (21) in which the impeller (13) is disposed and the flow passage (22). The partitioning member (15) forms a slit (d), which extends along an inner peripheral surface of the housing (11), between the partitioning member (15) and the inner peripheral surface of the housing (11). The slit (d) has a width (w) of 0.6 mm or less.
