An electric motor comprising: a stator portion including an annular armature ; a rotor portion inserted inside the armature ; and a bearing mechanism arranged to support the rotor portion such that the rotor portion is rotatable about a central axis (J1) of the armature with respect to the stator portion ; wherein the armature includes: a core including a plurality of teeth arranged radiately around the rotor portion , and a core back arranged to magnetically connect outer ends of the teeth to one another; an insulator arranged to cover the teeth ; a plurality of coils each defined by a lead wire wound around a separate one of the teeth with the insulator therebetween; and a wiring member arranged on the insulator and connected to the lead wire ; the insulator includes a wall portion arranged to project in a direction parallel to the central axis (J1), and spread substantially in a circumferential direction centered on the central axis (J1) to be in contact with a radially outer end of the coil ; characterized in that with respect to at least one of the teeth , a winding start portion and a winding end portion of the lead wire to define the coil are arranged to intersect and be in contact with each other in a radial direction centered on the central axis (J1) to define an intersection portion ; the intersection portion and the wall portion are arranged to overlap with each other in the radial direction, while the wiring member is arranged in contact with an outside of the wall portion ; and the wall portion includes a lead wire escape portion spaced radially outward from the coil and arranged at a position at which the wall portion and the intersection portion overlap with each other in the radial direction. a stator portion including an annular armature ; a rotor portion inserted inside the armature ; and a bearing mechanism arranged to support the rotor portion such that the rotor portion is rotatable about a central axis (J1) of the armature with respect to the stator portion ; wherein the armature includes: a core including a plurality of teeth arranged radiately around the rotor portion , and a core back arranged to magnetically connect outer ends of the teeth to one another; an insulator arranged to cover the teeth ; a plurality of coils each defined by a lead wire wound around a separate one of the teeth with the insulator therebetween; and a wiring member arranged on the insulator and connected to the lead wire ; a core including a plurality of teeth arranged radiately around the rotor portion , and a core back arranged to magnetically connect outer ends of the teeth to one another; an insulator arranged to cover the teeth ; a plurality of coils each defined by a lead wire wound around a separate one of the teeth with the insulator therebetween; and a wiring member arranged on the insulator and connected to the lead wire ; the insulator includes a wall portion arranged to project in a direction parallel to the central axis (J1), and spread substantially in a circumferential direction centered on the central axis (J1) to be in contact with a radially outer end of the coil ; characterized in that with respect to at least one of the teeth , a winding start portion and a winding end portion of the lead wire to define the coil are arranged to intersect and be in contact with each other in a radial direction centered on the central axis (J1) to define an intersection portion ; the intersection portion and the wall portion are arranged to overlap with each other in the radial direction, while the wiring member is arranged in contact with an outside of the wall portion ; and the wall portion includes a lead wire escape portion spaced radially outward from the coil and arranged at a position at which the wall portion and the intersection portion overlap with each other in the radial direction. <EOS>