To provide a transformed hair follicle and a method for transferring a gene to a mammal by means of the transformed hair follicle.The invention provides a method for producing a transformed hair follicle including transferring a gene into a hair follicle by use of a virus vector, characterized by including providing a lentivirus pseudo-typed with VSV-G as a virus vector and transfecting a hair follicle with the lentivirus ex vivo.
