HAIR EXTENSION

ProblemProvided is a practical hair extension configured to be very easily attached to head hair (natural hair) and attachment of which on the head hair is less likely to be noticed by other people.SolutionA hair extension 1 includes a hair bundle 2, a double-sided adhesive tape 3, and a release paper 4. The hair bundle 2 has a base end including a first hair layer L1 formed by laterally aligning a plurality of hairs h1, h1.. such that base end edges of the plurality of hairs are linearly arranged and bonding vicinities of the base ends of the hairs h1, h1 with an adhesive so as to have a constant adhesive width, and a second hair layer L2 formed by laminating a plurality of hairs h2, h2.. to be laterally aligned on an upper side of the first hair layer L1 such that base end edges of the plurality of hairs are linearly arranged and bonding vicinities of the base ends of the hairs h2, h2.. with an adhesive so as to have an adhesive width narrower than the adhesive width of the first hair layer L1. Furthermore, the double-sided adhesive tape 3 is stuck to the first hair layer L1.