A head ornament fastening member (10) that attaches a head ornament (20) to hairs (19) on a head. The head ornament fastening member comprises a first fastening means (13) that includes a base (11), and a plurality of stems (12) which protrude from a surface of the base (11) and are inserted into the hairs (19) from upside; and a second fastening means (15) that includes a plurality of comb-tooth-like portions (14) which intersect the plurality of stems (12) and are inserted into the hairs (19) from a lateral direction. The plurality of stems (12) of the first fastening means (13) and the plurality of comb-tooth-like portions (14) of the second fastening means (15) intersect with each other in the hairs (19) from upside and a lateral direction, thereby fastening the head ornament to the hairs.