Provided is a functional polarization lens obtained by insert-molding a functional polarization element for insert molding comprising a polarization element (A). In the polarization element (A), a hardened coating film (2) is formed on a concave side of a polarization film (1) by applying and drying a coating material obtained by adding 4-20 parts by mass of a functional dye to 100 parts by mass of transparent adhesive, a convex side of the polarization film (1) being coated with a hardened coating film (3) of transparent adhesive.