A fastener for a wig is configured by connecting and fixing two approximately U-shape members. Each of the approximately U-shape members is configured of a comb teeth fixed piece 11 to which comb teeth 20 are fixed, and two curved elastic leg portions 12, 13 which extend from both ends of the comb teeth fixed piece in the same direction which is approximately perpendicular to the comb teeth fixed piece. The two approximately U-shape members are connected to each other at a plurality of connecting points located away from each other in a direction that each of the curved elastic leg portions 12, 13 extends under the condition that opening portions 15 of the approximately U-shape members face each other and the curved elastic leg portions 12,13 are overlapped each other. Accordingly, both members have both a high elastic deformation capability and a high integrity. Therefore, during the operation such that the fastener S for a wig are reversed by fingers, if one of the approximately U-shape members 10 is reversed, the other approximately U-shape member 10 is always reversed at the same time (one reversing operation is always enough).