The present invention relates to a method for mass-production of human follicle stimulating hormone, more precisely, to an expression vector containing human follicle stimulating hormone gene, a transformant transfected with the expression vector and a method for mass-production of human follicle stimulating hormone by using the same. Human follicle stimulating hormone can be produced largely by using an expression vector and a transformant of the present invention. Therefore the expression vector and the transformant of the present invention can be effectively used for the treatment of infertility.
