To provide a stator manufacturing method and a stator, capable of improving radiation of a stator composed of a plurality of stator segments.

The method of manufacturing the stator 1 is configured to obtain the stator 1 integrated by arranging the plurality of stator segments 10 in a ring shape such that side faces thereof are abutted with each other, and by assembling a tightening ring 20 on an outer periphery thereof by means of shrinkage fit. An insulator 12 constituting the stator segment 10 is made of thermoplastic resin and the insulator 12 is softened by heat transfer from the tightening ring 20 during shrinkage fit to be brought into close contact with a stator core 11.