A method of manufacturing a stator core for a dynamo-electric machine, by preparing a cylindrical laminated body by winding into a helical shape a continuous first sheet formed by press-punching from a first magnetic steel sheet material. Preparing a plurality of second sheets having a predetermined length by press-punching from a thicker second magnetic steel sheet material. Next, chamfered portions are formed on edge portions of second recess portions by chamfering the second sheet. Then, the second sheets are bent into an annular shape and the second sheets bent into the annular shape are stacked on both axial ends of the laminated body and integrated by laser welding.