Abstract: A low-cost leadframe in which leads are stably and securely retained. The leadframe is provided with a lead retaining section for securely retaining internal leads together. Such a lead retaining section is molded from the same thermosetting resin as used for molding a resin encapsulated package and formed on the internal leads on the side of a die pad such that it extends, in the form of a strip, over the surfaces of the internal leads arranged in rows and such that it is adhered to the internal leads and embedded in the gaps between the internal leads.