In a stator winding method for winding conductive wires 8 around teeth 4a to 4f of a stator core 4 having 3n teeth 4a to 4f and 3n slots 5a to 5f by use of a bobbin machine 12 having three nozzles 13, the slots 5a to 5f on both sides of the teeth 4a, 4d, 4f in the nth winding process are formed, in respective slot portions on the side of the teeth 4a, 4d, 4f in the nth winding process, so that respective depths “A” are all smaller than respective depths “B” of the remaining portions. At the final stage of the nth winding process, the nozzles 13 are moved from the interior side of the slots 5a to 5f toward the inner circumferential side of the stator core 3 and furthermore, the conductive wires 8 are wound around the teeth 4b, 4d, 4f so that each gap 14 between the conductive wires 8 wound around the teeth 4b, 4d, 4f and the conductive wires 8 wound around the teeth 4a, 4c, 4e is smaller than an outer diameter of the nozzle 13.