A blower device includes a fan and a housing. The fan includes an impeller that is rotatable about a center axis. The housing accommodates the fan. The housing includes a tubular wall that extends along a center axis and covers the impeller from a radially outer side. The impeller includes a plurality of blades arranged in a circumferential direction. A cutting mark is provided on at least a portion of an inner circumferential surface of the tubular wall radially facing the blades or radially outer end portions of the blades.