A stator of a motor, comprising: a stator core having a plurality of teeth; windings, a part of each winding being wound around teeth of the stator core via an insulator; the insulator comprising a peripheral wall having sub-walls, each sub-wall corresponding to a slot, a slot being defined between each of two circumferentially adjacent teeth; lead-out guide portions provided in the insulator and enabling lead-out wires to be drawn out from corresponding tooth winding portions of the windings in a state of being close to the corresponding tooth winding portions; wherein each of the lead-out guide portions comprises a groove provided in a sub-wall, and wherein each groove is formed in and radially extends through a sub-wall and consists of an axially extending main part and notch portions at an open end of the main part, and each groove is shifted by a predetermined angle (θ1) relative to a center of a slot, wherein each winding comprises in sequence, a first neutral wire which connects the neutral point to the starting point of a first tooth winding portion (11 a), a first tooth winding portion (11 a) with is wound around the first tooth, a first lead-out wire, a crossover wire which crosses over from the end point of the first tooth winding portion (11 a) to the opposite second tooth, a power wire which is a prolongation of the crossover wire, said power wire extending away and back to the second tooth, a second tooth winding portion (11 b) which is wound around the second tooth, a second lead-out wire, a second neutral wire which is connected to the neutral point the lead-out wires being fitted in the grooves. a stator core having a plurality of teeth; windings, a part of each winding being wound around teeth of the stator core via an insulator; the insulator comprising a peripheral wall having sub-walls, each sub-wall corresponding to a slot, a slot being defined between each of two circumferentially adjacent teeth; lead-out guide portions provided in the insulator and enabling lead-out wires to be drawn out from corresponding tooth winding portions of the windings in a state of being close to the corresponding tooth winding portions; wherein each of the lead-out guide portions comprises a groove provided in a sub-wall, and wherein each groove is formed in and radially extends through a sub-wall and consists of an axially extending main part and notch portions at an open end of the main part, and each groove is shifted by a predetermined angle (θ1) relative to a center of a slot, wherein each winding comprises in sequence, a first neutral wire which connects the neutral point to the starting point of a first tooth winding portion (11 a), a first tooth winding portion (11 a) with is wound around the first tooth, a first lead-out wire, a crossover wire which crosses over from the end point of the first tooth winding portion (11 a) to the opposite second tooth, a power wire which is a prolongation of the crossover wire, said power wire extending away and back to the second tooth, a second tooth winding portion (11 b) which is wound around the second tooth, a second lead-out wire, a second neutral wire which is connected to the neutral point the lead-out wires being fitted in the grooves.