A dual rotor type motor comprising: a shaft rotatably provided in a bearing housing of an appliance; a rotor assembly rotating with a center thereof fastened to the shaft, the rotor assembly comprising an outer rotor spaced from the center of the shaft a predetermined distance with magnets secured along a circumferential direction, and an inner rotor provided in an inside of the outer rotor at a predetermined distance with magnets secured along a circumferential direction; and a stator comprising a core made of metal, an insulator of an insulating material for surrounding the core so as to have a first surface and a second surface of the core to be exposed outside, a coil wound on the outer surface of the insulator, a molding part of insulating material for surrounding the insulator and the coil by insert molding as one body to expose the first and second surfaces of the core in a state of the insulator being provided in a circular shape, and a fixing part for securing the molding part to the bearing housing, the stator provided between the outer rotor and the inner rotor so that the exposed first and second surfaces of the core face at a predetermined distance the magnets of the outer and inner rotors (10, 20) respectively, characterized in that the core comprises: an outer core comprising a first plurality of teeth extending in a radius direction with a first surface thereof facing the magnets of the outer rotor, and a first base for connecting inner ends of the first plurality of teeth to one another; and an inner core comprising a second plurality of teeth extending in a radius direction with a second surface thereof facing the magnets of the inner rotor, and a second base for connecting outer ends of the second plurality of teeth to one another. a shaft rotatably provided in a bearing housing of an appliance; a rotor assembly rotating with a center thereof fastened to the shaft, the rotor assembly comprising an outer rotor spaced from the center of the shaft a predetermined distance with magnets secured along a circumferential direction, and an inner rotor provided in an inside of the outer rotor at a predetermined distance with magnets secured along a circumferential direction; and a stator comprising a core made of metal, an insulator of an insulating material for surrounding the core so as to have a first surface and a second surface of the core to be exposed outside, a coil wound on the outer surface of the insulator, a molding part of insulating material for surrounding the insulator and the coil by insert molding as one body to expose the first and second surfaces of the core in a state of the insulator being provided in a circular shape, and a fixing part for securing the molding part to the bearing housing, the stator provided between the outer rotor and the inner rotor so that the exposed first and second surfaces of the core face at a predetermined distance the magnets of the outer and inner rotors (10, 20) respectively, characterized in that the core comprises: an outer core comprising a first plurality of teeth extending in a radius direction with a first surface thereof facing the magnets of the outer rotor, and a first base for connecting inner ends of the first plurality of teeth to one another; and an inner core comprising a second plurality of teeth extending in a radius direction with a second surface thereof facing the magnets of the inner rotor, and a second base for connecting outer ends of the second plurality of teeth to one another. an outer core comprising a first plurality of teeth extending in a radius direction with a first surface thereof facing the magnets of the outer rotor, and a first base for connecting inner ends of the first plurality of teeth to one another; and an inner core comprising a second plurality of teeth extending in a radius direction with a second surface thereof facing the magnets of the inner rotor, and a second base for connecting outer ends of the second plurality of teeth to one another.