Blower

A blower comprising:

• a pair of impellers rotatable with a central axis as a center, and coaxially or substantially coaxially positioned;
• a pair of housings extending along the central axis and having a tubular shape with both end surfaces in an axial direction being open, the pair of housings respectively housing the pair of impellers;
• a straightening grid that is between the pair of impellers, and includes a plurality of ventilation passages that have a tubular shape and through which an airflow flows, the plurality of ventilation passages being arranged on a plane that intersects the plurality of ventilation passages in the axial direction;
• and
• a holding portion which is defined by a separate independent structure which is provided at a position that is between the pair of housings, and holds a peripheral edge of the straightening grid;
• wherein
• the straightening grid and the holding portion are made of different structures;
• and
• the holding portion includes a support portion which opposes the peripheral edge of the straightening grid in the axial direction.