Provided is a cross-flow fan comprising a rotating shaft, at least a pair of holding plates (10), and circular arc-shaped blade plates (14). The holding plates (10) are arranged at a distance from each other in the direction in which the rotating shaft extends. The circular arc-shaped blade plates (14) are inserted in and affixed to a plurality of circular arc-shaped holes (12) formed in the outer periphery (10o) of the holding plates (10). The holding plates (10) each have an outer peripheral edge region (10e) provided in the region of the holding plate (10), which is located closer to the outer periphery of the holding plate (10) than the holes (12); first contact sections (18i), second contact sections (18o), and third contact sections (18c), the first to third contact sections being in contact with and supporting the blade plates (14); and first non-contact sections (20a), second non-contact sections (20b), and third non-contact sections (20c), the first to third non-contact sections being not in contact with the blade plates (14).