There is provided an electronic motor in which a stator core is thinned to obtain an increased diameter of a rotor is to produce a high power output, and a stator can be positioned with high accuracy at the time when a coil is wound on the stator. The outside peripheral surface of a yoke part 31 is substantially the same as the outside peripheral surface of a flange 42 of an insulator 4, and in a part of the flange 42, a cut-away part 43 is provided to expose a part of the end face of a stator core 30.