A stator comprising: a stator core including a core back having an annular shape centered at a center axis extending in a vertical direction; an upper insulator provided on an upper side of the stator core; and a lower insulator provided on a lower side of the stator core, wherein the stator core includes a plurality of teeth projecting radially from the core back; and a plurality of umbrella portions each extending in a circumferential direction from a radial end of a corresponding one of the teeth, wherein the upper insulator covers at least a part of an upper surface of each of the teeth, wherein the lower insulator covers at least a part of a lower surface of each of the teeth, wherein the upper insulator and the lower insulator each include extended portions (2723, 2733) each extending in the circumferential direction near a radially outer end of a corresponding one of the teeth, wherein the teeth are each provided with a coil formed of a conducting wire that is wound around the tooth with the upper insulator and the lower insulator in between, and wherein the extended portions of the lower insulator each have a guide portion at an edge on a circumferentially outer and upper side near a region where the conducting wire is led from the upper side toward the lower side when wound into the coil, wherein the extended portions of the lower insulator each include a lower-insulator wall portion extending in the circumferential direction and projecting upward, wherein the extended portions of the upper insulator each include an upper-insulator wall portion extending in the circumferential direction and projecting downward, wherein the lower-insulator wall portion is positioned on a radially inner side with respect to the upper-insulator wall portion, wherein the lower-insulator wall portion and the upper-insulator wall portion face each other with a gap in between such that a groove is produced, and characterized in that the lower-insulator wall portion has the guide portion only at an edge on the circumferentially outer and upper side near the region where the conducting wire is led from the upper side toward the lower side, the guide portion having a curved surface that smoothly curves circumferentially outward and downward. a stator core including a core back having an annular shape centered at a center axis extending in a vertical direction; an upper insulator provided on an upper side of the stator core; and a lower insulator provided on a lower side of the stator core, wherein the stator core includes a plurality of teeth projecting radially from the core back; and a plurality of umbrella portions each extending in a circumferential direction from a radial end of a corresponding one of the teeth, a plurality of teeth projecting radially from the core back; and a plurality of umbrella portions each extending in a circumferential direction from a radial end of a corresponding one of the teeth, wherein the upper insulator covers at least a part of an upper surface of each of the teeth, wherein the lower insulator covers at least a part of a lower surface of each of the teeth, wherein the upper insulator and the lower insulator each include extended portions (2723, 2733) each extending in the circumferential direction near a radially outer end of a corresponding one of the teeth, wherein the teeth are each provided with a coil formed of a conducting wire that is wound around the tooth with the upper insulator and the lower insulator in between, and wherein the extended portions of the lower insulator each have a guide portion at an edge on a circumferentially outer and upper side near a region where the conducting wire is led from the upper side toward the lower side when wound into the coil, wherein the extended portions of the lower insulator each include a lower-insulator wall portion extending in the circumferential direction and projecting upward, wherein the extended portions of the upper insulator each include an upper-insulator wall portion extending in the circumferential direction and projecting downward, wherein the lower-insulator wall portion is positioned on a radially inner side with respect to the upper-insulator wall portion, wherein the lower-insulator wall portion and the upper-insulator wall portion face each other with a gap in between such that a groove is produced, and characterized in that the lower-insulator wall portion has the guide portion only at an edge on the circumferentially outer and upper side near the region where the conducting wire is led from the upper side toward the lower side, the guide portion having a curved surface that smoothly curves circumferentially outward and downward.