A wig includes a front end and a rear end. A lower end of the front end forms an edge part, and adhesive strips are provided on both sides of the front end. An elastic strap is provided at a lower end of the rear end. A first adjusting structure is provided on a surface of the elastic strap. The first adjusting structure includes: a first band, one end of which is connected to one end of the elastic strap and the other end of the first band is provided with a first hook; a second band, one end of which is connected to the other end of the elastic strap and the other end of the second band is provided with a second hook; and a first socket, provided in the middle of the elastic strap. The first hook and the second hook are plugged in the first socket.