A three-phase DC brushless motor comprising: a stator having a stator core including a plurality of stator pole teeth around which coils are wound; 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 , wherein the stator core has first pole teeth (4a1), second pole teeth (4a2) and third pole teeth (4a3) for three phases that are disposed in a circumferential direction and project radially, the stator pole teeth including the first pole teeth (4a1), the second pole teeth (4a2), and the third pole teeth (4a3), each of the first pole teeth (4a1) faces one of the rotor magnets so as to be aligned with one of the magnetic poles of the rotor magnets and has a tooth tip symmetric with respect to a shaft line in a radial direction, each of the second pole teeth (4a2) and each of the third pole teeth (4a3) are disposed adjacent to one of the first pole teeth (4a1) in the circumferential direction and have tooth tips (4a2a and 4a3a) asymmetric with respect to shaft lines in the radial direction, a distance (t2) between the tooth tips (4a2a and 4a3a) of each of the second pole teeth (4a2) and each of the third pole teeth (4a3) is smaller than a distance (t1) between the tooth tips (4ala and 4a2a) of each of the first pole teeth (4a1) and each of the second pole teeth (4a2) and the distance (t1) between the tooth tips (4ala and 4a3a) of each of the first pole teeth (4a1) and each of the third pole teeth (4a3), and the second pole tooth (4a2) and the third pole tooth (4a3) that are disposed adjacent to the first pole tooth (4a1) in the circumferential direction act as a single pseudo second pole tooth (4a4) that faces rotor magnetic poles so that an attraction force is exerted there between. a stator having a stator core including a plurality of stator pole teeth around which coils are wound; 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 , wherein the stator core has first pole teeth (4a1), second pole teeth (4a2) and third pole teeth (4a3) for three phases that are disposed in a circumferential direction and project radially, the stator pole teeth including the first pole teeth (4a1), the second pole teeth (4a2), and the third pole teeth (4a3), each of the first pole teeth (4a1) faces one of the rotor magnets so as to be aligned with one of the magnetic poles of the rotor magnets and has a tooth tip symmetric with respect to a shaft line in a radial direction, each of the second pole teeth (4a2) and each of the third pole teeth (4a3) are disposed adjacent to one of the first pole teeth (4a1) in the circumferential direction and have tooth tips (4a2a and 4a3a) asymmetric with respect to shaft lines in the radial direction, a distance (t2) between the tooth tips (4a2a and 4a3a) of each of the second pole teeth (4a2) and each of the third pole teeth (4a3) is smaller than a distance (t1) between the tooth tips (4ala and 4a2a) of each of the first pole teeth (4a1) and each of the second pole teeth (4a2) and the distance (t1) between the tooth tips (4ala and 4a3a) of each of the first pole teeth (4a1) and each of the third pole teeth (4a3), and the second pole tooth (4a2) and the third pole tooth (4a3) that are disposed adjacent to the first pole tooth (4a1) in the circumferential direction act as a single pseudo second pole tooth (4a4) that faces rotor magnetic poles so that an attraction force is exerted there between. <EOS>