A brushless motor comprising: a stator having a stator core provided with a plurality of stator pole teeth around which coils are formed; and a rotor having a rotor shaft rotatably supported via a bearing, the rotor shaft being provided at the center of a rotor yoke having a plurality of rotor magnets facing the stator pole teeth, the brushless motor being characterized in that: the stator core has a plurality of first pole teeth (4a1), a plurality of second pole teeth (4a2), and a plurality of third pole teeth (4a3) disposed in the circumferential direction so as to project in the radial direction from an annular part, each of the first pole teeth (4a1) has a tooth tip (4a1a) symmetric with respect to the shaft line in the radial direction, each of the second pole teeth (4a2) and each of the third pole teeth (4a3) are adjacent to one of the first pole teeth (4a1) in the circumferential direction and have tooth tips (4a2a, 4a3a) asymmetric with respect to the shaft lines in the radial direction, a distance between the tooth tips (4a2a, 4a3a) of each of the second pole teeth (4a2) and each of the third pole teeth (4a3) is smaller than a distance between the tooth tip of each of the first pole teeth (4a1) and the tooth tip (4a2a) of each of the second pole teeth (4a2) and a distance between the tooth tip of each of the first pole teeth (4a1) and the tooth tip (4a3a) of each of the third pole teeth (4a3), and a pair of guide cores is laminated with and assembled integrally to both ends in a lamination direction of the stator core, each of the guide cores having a plurality of pole teeth provided with a plurality of tooth tips (14a1) symmetric with respect to shaft lines in a radial direction, a distance between the adjacent tooth tips (14a1) being uniform. a stator having a stator core provided with a plurality of stator pole teeth around which coils are formed; and a rotor having a rotor shaft rotatably supported via a bearing, the rotor shaft being provided at the center of a rotor yoke having a plurality of rotor magnets facing the stator pole teeth, the brushless motor being characterized in that: the stator core has a plurality of first pole teeth (4a1), a plurality of second pole teeth (4a2), and a plurality of third pole teeth (4a3) disposed in the circumferential direction so as to project in the radial direction from an annular part, each of the first pole teeth (4a1) has a tooth tip (4a1a) symmetric with respect to the shaft line in the radial direction, each of the second pole teeth (4a2) and each of the third pole teeth (4a3) are adjacent to one of the first pole teeth (4a1) in the circumferential direction and have tooth tips (4a2a, 4a3a) asymmetric with respect to the shaft lines in the radial direction, a distance between the tooth tips (4a2a, 4a3a) of each of the second pole teeth (4a2) and each of the third pole teeth (4a3) is smaller than a distance between the tooth tip of each of the first pole teeth (4a1) and the tooth tip (4a2a) of each of the second pole teeth (4a2) and a distance between the tooth tip of each of the first pole teeth (4a1) and the tooth tip (4a3a) of each of the third pole teeth (4a3), and a pair of guide cores is laminated with and assembled integrally to both ends in a lamination direction of the stator core, each of the guide cores having a plurality of pole teeth provided with a plurality of tooth tips (14a1) symmetric with respect to shaft lines in a radial direction, a distance between the adjacent tooth tips (14a1) being uniform. the stator core has a plurality of first pole teeth (4a1), a plurality of second pole teeth (4a2), and a plurality of third pole teeth (4a3) disposed in the circumferential direction so as to project in the radial direction from an annular part, each of the first pole teeth (4a1) has a tooth tip (4a1a) symmetric with respect to the shaft line in the radial direction, each of the second pole teeth (4a2) and each of the third pole teeth (4a3) are adjacent to one of the first pole teeth (4a1) in the circumferential direction and have tooth tips (4a2a, 4a3a) asymmetric with respect to the shaft lines in the radial direction, a distance between the tooth tips (4a2a, 4a3a) of each of the second pole teeth (4a2) and each of the third pole teeth (4a3) is smaller than a distance between the tooth tip of each of the first pole teeth (4a1) and the tooth tip (4a2a) of each of the second pole teeth (4a2) and a distance between the tooth tip of each of the first pole teeth (4a1) and the tooth tip (4a3a) of each of the third pole teeth (4a3), and a pair of guide cores is laminated with and assembled integrally to both ends in a lamination direction of the stator core, each of the guide cores having a plurality of pole teeth provided with a plurality of tooth tips (14a1) symmetric with respect to shaft lines in a radial direction, a distance between the adjacent tooth tips (14a1) being uniform.