A method of connecting an electric cable to a connector terminal includes arranging a connector terminal in a lower die so that an end portion of the electric cable in which a core wire is exposed from an outer cover is arranged in a barrel portion of the connector terminal, pressing a crimper to the barrel portion to crimp the barrel portion, overlapping the lower die with an upper die to form an injection space around the barrel portion and the end portion of the electric cable, and injecting a resin in an injection space, thereby forming a resin mold that covers and waterproofs the barrel portion and the end portion of the electric cable.